Merriam-Webster’s collegiate dictionary (11th ed.). (2005). Merriam-Webster.
Note: When a work has no author, use the title.
Only use Anonymous as author when the author is specifically designated as “Anonymous”.
... the mechanics of biological and especially muscular activity (“Merriam-Webster’s”, 2005)
Note: If the title is prohibitively long, use a shortened form of the title.