APA
(1974). Medical Letter on Drogs and Therapeutics. New Rochele: Medical Letter Inc.
Chicago
1974. Medical Letter on Drogs and Therapeutics. New Rochele: Medical Letter Inc.
Harvard
(1974). Medical Letter on Drogs and Therapeutics. New Rochele: Medical Letter Inc.
MLA
Medical Letter on Drogs and Therapeutics. New Rochele: Medical Letter Inc. 1974.