How do I cite the diagnostic and statistical manual of disorders fourth edition in apa format for resources?

Cite in Reference page as shown below. Use hanging format; plus I don't know the year of publication, edition you have, or City, State. Some cities you do not have to list State; see 5th ed. section 4.03 p. 217 of APA Manual American Psychological Association. (2002). Diagnostic and Statistical Manual of Mental Disorders (4th ed.). City, State: American Psychological Association.