APA (7th ed.) Citation

(1976). The Merck index: An encyclopedia of chemicals and drugs (9th Ed.). Merck.

Chicago Style (17th ed.) Citation

The Merck Index: An Encyclopedia of Chemicals and Drugs. 9th Ed. Rahway, N.J: Merck, 1976.

MLA (9th ed.) Citation

The Merck Index: An Encyclopedia of Chemicals and Drugs. 9th Ed. Merck, 1976.