Gaya APA

Preston, J, D., O’Neal, J, H. (2010). Handbook of Clinical Psychopharmacology for Therapists (6th ed.). U.S.A: New Harbinger Publications.

Gaya MLA

Preston, John, D., O’Neal, John, H. "Handbook of Clinical Psychopharmacology for Therapists". 6th ed. U.S.A: New Harbinger Publications, 2010. print.