The Writing Center @ The University of Wisconsin - Madison
The Writer's Handbook
Chicago Documentation Style

Subsequent reference: Latin abbreviations

When referring to the same work as in the citation immediately preceding, use the abbreviation "Ibid." for the second reference. This is acceptable even if several pages of text separate the first and second references.

The abbreviation "Ibid." is followed by a page number if the page from which the second reference is taken is different from the first.

If the pages are the same, no number is necessary.

First reference

1. Eliza G. Wilkins, The Delphic Maxims in Literature Chicago: Scott, Foresman and Co., 1929), 12.

Second reference: No change

2. Ibid.

[Be sure to use roman, not italic, type.]

Second reference: Different page

3. Ibid., 13.