APA (7th ed.) Citation

(1959). The Medical letter on drugs and therapeutics ([English edition].). Medical Letter.

Chicago Style (17th ed.) Citation

The Medical Letter on Drugs and Therapeutics. [English edition]. New Rochelle, N.Y.: Medical Letter, 1959.

MLA (9th ed.) Citation

The Medical Letter on Drugs and Therapeutics. [English edition]. Medical Letter, 1959.