APA (7th ed.) Citation

Barker, L. F. (1928). The young man and medicine. Macmillan.

Chicago Style (17th ed.) Citation

Barker, Lewellys F. The Young Man and Medicine. New York: Macmillan, 1928.

MLA (9th ed.) Citation

Barker, Lewellys F. The Young Man and Medicine. Macmillan, 1928.