In Chicago style, the first time that an item is cited, provide a full citation for the item. For subsequent citations, use a shortened version of the footnote, which includes:
- Author's last name (for edited works, use the editor's last name, but omit the "ed." after the name)
- Shortened form of title (Only shorten titles that contain 4+ words; use 2-4 keywords from the full title. Omit initial articles such as A, An, or The)
- Page number (when available)
Examples of full footnotes followed by short form footnotes:
1. John Bright, Jeremiah. The Anchor Bible (Garden City, NY: Doubleday, 1965), 60.
2. Danna Nolan Fewell and David M. Gunn, “Boaz, Pillar of Society: Measures of Worth in the Book of Ruth,” Journal for the Study of the Old Testament 45 (1989): 46.
3. Arthur A. Just, ed., “Overview, Luke 3:1-20,” in Luke, Ancient Christian Commentary (Downers Grove, IL: InterVarsity Press, 2001), 57.
4. Bright, Jeremiah, 60.
5. Fewell and Gunn, “Boaz, Pillar of Society,” 46.
6. Just, “Luke 3:1-20,” 57.
