Surname, A. B., Surname, C. D., & Surname, E. F. (Eds.). (Year). Book title: Subtitle (edition). Place of publication: Publisher.
Harris, P., Vardaxis, N., & Nagy, S. (Eds.). (2010). Mosby's dictionary of medicine, nursing & health professions (2nd ed.). Sydney, NSW: Mosby.
Note: When a work has no author, the title of the work comes to the front. In the reference list, alphabetise by the first significant word in the title. Only use Anonymous as author when the author is specifically designated as “Anonymous”.
Merriam-Webster’s collegiate dictionary (11th ed.). (2005). Springfield, MA: Merriam-Webster.
According to Harris, Vardaxis, and Nagy (2010, p. 85)...
Harris et al. (2010)
Note: When citing a source with no author, use shortened form of the title within quotation marks.
... ("Merriam-Webster's", 2005)