Introduction:
The Chicago NB (Notes & Bibliography) system is often used in the humanities and provides writers with a system for referencing their sources through footnote or endnote citation in their writing and through bibliography pages. It also offers writers an outlet for commenting on those cited sources. The NB system is most commonly used in the discipline of history.
Footnotes and Endnotes:
In the NB system, you should include a note (endnote or footnote) each time you use a source, whether through a direct quote or through a paraphrase or summary. Footnotes will be added at the end of the page on which the source is referenced, and endnotes will be compiled at the end of each chapter or at the end of the entire document.
In either case, a superscript number corresponding to a note with the bibliographic information for that source should be placed in the text following the end of the sentence or clause in which the source is referenced.
The first note for each source should include all relevant information about the source: author’s full name, source title, and facts of publication. If you cite the same source again, the note need only include the surname of the author, a shortened form of the title (if more than four words), and page number(s).
The footnote or endnote itself begins with the appropriate number followed by a period and then a space.
Bibliographies:
In the NB system, the bibliography provides an alphabetical list of all sources used in a given work. This page, most often titled Bibliography, is usually placed at the end of the work preceding the index. It should include all sources cited within the work and may sometimes include other relevant sources that were not cited but provide further reading.
Although bibliographic entries for various sources may be formatted differently, all included sources (books, articles, Web sites, etc.) are arranged alphabetically by author’s last name. If no author or editor is listed, the title or keyword by which the reader would search for the source may be used instead.
Common Elements
All entries in the bibliography will include the author (or editor, compiler, translator), title, and publication information.
Author’s Names
The author’s name is inverted in the bibliography, placing the last name first and separating the last name and first name with a comma; for example, John Smith becomes Smith, John. (If an author is not listed first, this applies to compilers, translators, etc.)
Titles
Titles of books and journals are italicized. Titles of articles, chapters, poems, etc. are placed in quotation marks.
Publication Information
The year of publication is listed after the publisher or journal name.
Punctuation
In a bibliography, all major elements are separated by periods.
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:
Using short notes instead of ibid. is an update to Chicago style as of the 17th edition.
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, “Overview, Luke 3:1-20,” 57.