APA Style

(ed), O, M, J. (2001). The Merck Index : an encyclopedia of chemicals, drugs, and biologicals . (13th Ed.). Whitehouse Station: Merck.

MLA Style

(ed), O`Neil, Maryadele, J. "The Merck Index : an encyclopedia of chemicals, drugs, and biologicals .". 13th Ed. Whitehouse Station: Merck, 2001. Text.