Cita APA (7th ed.)

Boyd, M. F. 1. (1945). Preventive medicine. W. B. Saunders company.

Cita Chicago (17th ed.)

Boyd, Mark Frederick 1889. Preventive Medicine. Philadelphia: W. B. Saunders company, 1945.

Cita MLA (9th ed.)

Boyd, Mark Frederick 1889. Preventive Medicine. W. B. Saunders company, 1945.