APA (7th ed.) Citation

Merck & Co. (1979). The Merck index: An encyclopedia of chemicals and drugs (9. ed., 4. print.). Merck.

Chicago Style (17th ed.) Citation

Merck & Co. The Merck Index: An Encyclopedia of Chemicals and Drugs. 9. ed., 4. print. Rahway, N.J: Merck, 1979.

MLA (9th ed.) Citation

Merck & Co. The Merck Index: An Encyclopedia of Chemicals and Drugs. 9. ed., 4. print. Merck, 1979.