Cita APA (7th ed.)

Walker, B. R., & Ralston, S. H. (2010). Davidson's Principles and Practice of Medicine (21st ed.). Elsevier.

Cita Chicago (17th ed.)

Walker, Brian R., i Stuart H. Ralston. Davidson's Principles and Practice of Medicine. 21st ed. London: Elsevier, 2010.

Cita MLA (9th ed.)

Walker, Brian R., i Stuart H. Ralston. Davidson's Principles and Practice of Medicine. 21st ed. Elsevier, 2010.