Gaya APA

al., E. et al (1960). American Pharmacy-textbook Of Pharmaceutical Principles, Processes And Preparations (Ed. 5). Philadelphia: J.B.Lippincott Company.

Gaya MLA

al., Et. et al. "American Pharmacy-textbook Of Pharmaceutical Principles, Processes And Preparations". Ed. 5 Philadelphia: J.B.Lippincott Company, 1960. Text.