The general format below refers to a book with two authors.
If you are dealing with two editors or compilers instead of two authors, insert the names of the editors in place of the the authors' names, followed by "editors" without the quotation marks (see example). The rest of the format remains the same.
Works Cited List:
Author Surname, First Name and Author First Name, Last Name. Book Title: Subtitle. Publisher, Year.
Example:
Burley, Jon and Jeremiah Harris, compilers. A Companion to Genethics. Blackwell, 2007.
In-Text Citation:
(Author Last Name and Author Last Name page number)
Example:
(Burley and Harris 153)