APA (7th ed.) Citation

Olsen, P. C. (1940). The marketing of drug products. Harper & brothers.

Chicago Style (17th ed.) Citation

Olsen, Paul Crandall. The Marketing of Drug Products. New York, London: Harper & brothers, 1940.

MLA (9th ed.) Citation

Olsen, Paul Crandall. The Marketing of Drug Products. Harper & brothers, 1940.