What Does “Ibid.” Mean and How to Use It: Essential Rules and Examples
Updated 14 January 2026
Written by Elizabeth Miller
Table of contents
What does Ibid. Mean anyway?
How to use Ibid. in academic writing
Ibid. in Chicago style: usage rules
How to use short notes?
Ibid. in APA or MLA citation styles
FAQ
You may sometimes rely heavily on a few sources when completing academic papers. It may occur when these sources are particularly relevant and support a specific paragraph of your work. However, continuously quoting the same book or journal in your footnotes can become cumbersome.
Fortunately, following the Chicago style can be a blessing if you’re aware of one of its many time-saving tricks – “Ibid.” That said, though, getting to grips with what ‘ibid’ actually means is pretty crucial for getting your head around academic writing. And for those students who find themselves bogged down in the details, homework help services are often a welcome lifeline. The thing is, if you know what you’re doing with ibid, you can avoid having to repeat the same source details over and over in your paper – and that can really add up if you’re referencing the same text multiple times.
What does Ibid. Mean anyway?
Ibid. is a shortened form of the Latin ibidem, which translates to “in the same place”. For all you scholars out there, this means the abbreviation is used to refer to a source that’s already been fully cited in one of your footnotes or endnotes earlier on in your paper. By chucking this in, you’re able to send the reader back to the previous cite, saving them the hassle of having to dig it out all over again. It basically cuts down on all the fuss and bother of citing sources, especially when they’re right up your alley (i.e. the ones you keep coming back to).
How to use Ibid. in academic writing
Before introducing this element into your writing, confirm if your citation format allows it. This is specific to the Chicago referencing style, which utilize footnotes for citation purposes at the bottom of every page.
Discover some general guidelines to apply this element correctly in academic papers:
Always remember to include a period after ibid. to indicate it’s an abbreviation.
Add it when you consecutively cite the same source without any intervening citations.
If the page number you cite differs from the previous citation, it’s necessary to include a comma and a new page number, as indicated in our example: “Ibid., 8”.
When the abbreviation is used at the beginning of a footnote, it should start with a capital letter.
These guidelines help ensure clarity and precision in referencing sources per academic standards.
Ibid. in Chicago style: usage rules
As outlined in the Chicago Manual of Style, the usage of ibid. is limited to specific circumstances:
It can be applied when you are referencing the source you just cited. When citing the same book(journal or any other source) and page number, you must apply full notes for the initial citation and ibid. for subsequent references. If the source is the same with a change of the page number, include the new page number after the abbreviation followed by a comma.
Example:
1. James Stone, The History of Chicago (Chicago: University Press, 2020), 45.
2. Ibid., 56.
3. Ibid., 78.
It is appropriate to use this abbreviation multiple times but keep in mind that it solely refers to the preceding reference. Ibid. should not be used to quote a source again after citing another one. The source needs to be reintroduced. It can be accomplished by employing a shortened version of the Chicago style footnotes or endnotes.
Example:
1. Charles Johnson, The History of Modern Art (New York: ABC Publishing, 2022), 38.
2. Ibid., 41.
3. Jimmy Smoodley, The Art of Understanding: A Comprehensive Guide (New York: Art Press, 2022), 29.
4. Johnson, Modern Art, 51.
How to use short notes?
The short note provides condensed information about the source previously mentioned. The choice between ibid. and a short note depends on preference; recent trends lean towards short notes for clarity. When citing source for the first time use full notes, for subsequent citation use short notes: include the author’s last name, shortened title (if applicable), and page number(s). Excessive use of ibid. can make citations dense and harder to read. Most writers and style guides discourage its overuse in favor of short notes.
Example:
Full note:
James Stone, The History of Chicago: A Comprehensive Overview (Chicago: University Press, 2020), 45.
Short note:
Stone, History of Chicago, 45.
Ibid. in APA or MLA citation styles
Using ibid in APA or MLA citation styles kinda falls flat because both of these styles use in-text citations in the form of parentheses, rather than footnotes or endnotes. These styles are built around the idea of keeping things concise but still including all the necessary details to tell us where the info came from. So there’s no real need to use ibid to further abbreviate your citations.
What you should do instead in APA & MLA is include the author’s name and publication year right in the parentheses to give proper credit to the source. That keeps things clear and accurate – it makes sure readers know exactly which source you’re talking about.
FAQ
Why do some writers use ibid. in academic writing?
When you see ibid. used, it typically means the writer is quoting the same source again. But if you’re referring to a different page within that same source, you should include the page number to give even more detail and make it easy for the reader to find the right page.
Does the Chicago format work with this abbreviation?
Yep, the Chicago format is actually where ibid. is most at home – it lets you refer to a source again without having to write out the whole citation. Just make sure to include the full citation for the first time you mention a source, and from then on, you can use ibid.
Can I use ibid. in the APA format?
No, don’t bother trying – APA has a pretty strong preference for including all the details for each source (author’s name, publication year, title, etc) to make things easy to understand and follow.
How often can I use ibid.?
There are no restrictions on when to use ibid. and how often you may do it. It is essential to apply this element only where it suits the format.
Does ibid. mean the same as id.?
No, but it’s close to it. Id. is employed in the legal quotation as an abbreviation for “idem,” which signifies “the same” and possesses its own set of stylistic guidelines.
An academic writing specialist focused on citation accuracy and academic integrity. Contributing to EduBirdie since 2019, she helps students meet academic standards through structured writing, proper referencing, and ethical source use. Vast experience in English, History, Ethics.