An author-date citation in running text or at the end of a block quotation consists of the last (family) name of the author, followed by the year of publication of the work in question. In this context, "author" may refer not only to one or more authors or an institution but also to one or more editors, translators, or compilers. No punctuation appears between author and date.
For more examples, click on tabs for various types of sources
--- Basic
(Pacini 1997)
--- Two or three authors
(Ikenbery, Rankine, and Stice 1996)
--- More than three authors
(Zipursky et al. 1997)
--- When two or more works by different authors with the same last name appear in the bibliography
(C. Doershuk 2000)
(J. Doershuk 2001)
--- Where the author's name appears in the text, it need not be repeated in the parenthetical citations.
In “A Place for Space in Sociology,” sociologist Thomas Gieryn (2000, 482) embraces place as the domain
of all social scientists and moves its definition beyond the physical.
--- When the same page (or page range) in the same source is cited more than once in one paragraph, the parenthetical
citation can be placed after the last reference or at the end of the paragraph before the final period. When referring to
different pages in the same source, however, include a full parenthetical citation at the first reference; subsequent
citations need only include page numbers. (Chicago Manual Style, 15.27 p. 905)
