Chicago's Notes-Bibliography citation style: "uses a system of notes, whether footnotes or endnotes or both, and usually a bibliography. The notes allow space for unusual types of sources as well as for commentary on the sources cited, making this system extremely flexible. Because of this flexibility, the notes and bibliography system is preferred by many writers in literature, history, and the arts." - Chicago Manual of Style
The Notes-Bibliography system consists of endnotes or footnotes (N) within the text and a bibliography (B) at the end of the document.
Example of basic Chicago bibliography entry
1. Newton N. Minow and Craig L. LaMay, Inside the Presidential Debates: Their Improbable Past and Promising Future (Chicago: University of Chicago Press, 2008), 24–25.
The abbreviation ibid. usually refers to a single work cited in the note immediately preceding. It must never be used if the preceding note contains more than one citation. It takes the place of the name(s) of the author(s) or editor(s), the title of the work, and as much of the succeeding material as is identical. If the entire reference, including page numbers or other particulars, is identical, the word ibid. alone is used (as in note 7 below). The word ibid. is capitalized at the beginning of a note and followed by a period.