Gaya APA

Helms, R, A., Quan, D, J. (2006). Textbook of therapeutics: drug and disease management (ed.1). USA: Lippincott Williams And Wilkins.

Gaya MLA

Helms, Richard, A.., Quan, David, J.. "Textbook of therapeutics: drug and disease management". ed.1 USA: Lippincott Williams And Wilkins, 2006. Text.