APA (7th ed.) Citation

(1980). The Merck index: An encyclopedia of chemicals and drugs (9. ed., 5. print.).

Chicago Style (17th ed.) Citation

The Merck Index: An Encyclopedia of Chemicals and Drugs. 9. ed., 5. print. Rahway, NJ, 1980.

MLA (9th ed.) Citation

The Merck Index: An Encyclopedia of Chemicals and Drugs. 9. ed., 5. print. 1980.