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.
I am citing a book with four authors and the title of the book is incredibly long as well. You do list all four authors the first time you cite them in-text. However, once you have listed them all the first time, you can change to just listing the first author and replace the rest with et al.