APA (7th ed.) Citation

(1957). The Merck index of chemicals and drugs: An encyclopedia for the chemist, pharmacist, physician, and allied professions (6. ed., 4. print.). Merck.

Chicago Style (17th ed.) Citation

The Merck Index of Chemicals and Drugs: An Encyclopedia for the Chemist, Pharmacist, Physician, and Allied Professions. 6. ed., 4. print. Rahway, NJ: Merck, 1957.

MLA (9th ed.) Citation

The Merck Index of Chemicals and Drugs: An Encyclopedia for the Chemist, Pharmacist, Physician, and Allied Professions. 6. ed., 4. print. Merck, 1957.