Clay County, Kentucky. Clay County is a county located in the U.S. state of Kentucky. As of the 2010 census, the population was 21,730. Its county seat is Manchester. The county was formed in 1807 and named in honor of Green Clay (1757â1826).
1 Author's full name, last name first, followed by a period. If there are multiple authors, place a comma between each name, including a terminal comma, and preface the last author's name with 2  &. Year of publication, in parentheses, followed by a period.  The book's title, italicized. End with a period.
Book Citation. To cite a book in APA style, begin with the last name and first initial of the author,. Type the year the book was published in parentheses, followed by the title of the book in italics. As with journal articles, only the first letter of the first word should be capitalized.