Gaya APA

Stecher, P, G. (1960). The MERCK Index of Chemicals and Drugs 7th Edition (Ed 7). USA: MERCK & Co., Inc.

Gaya MLA

Stecher, Paul, G.. "The MERCK Index of Chemicals and Drugs 7th Edition". Ed 7 USA: MERCK & Co., Inc, 1960. Text.