APA (7th ed.) Citation

Bynum, W. F., & Porter, R. (1993). Companion encyclopedia of the history of medicine. Routledge.

Chicago Style (17th ed.) Citation

Bynum, W. F., and Roy Porter. Companion Encyclopedia of the History of Medicine. London ; New York: Routledge, 1993.

MLA (9th ed.) Citation

Bynum, W. F., and Roy Porter. Companion Encyclopedia of the History of Medicine. Routledge, 1993.