Gaya APA

Stecher, P, G. (1960). The Merck Index of chemicals and drugs; an encyclopedia for chemists, pharmacists, physicians, and members of allied professions, sevent edition . : Merck & Co., Inc.

Gaya MLA

Stecher, Paul, G.. "The Merck Index of chemicals and drugs; an encyclopedia for chemists, pharmacists, physicians, and members of allied professions, sevent edition". : Merck & Co., Inc, 1960. Text.