Gaya APA

Beauchamp, R, D., Townsend, C, M. (2008). Sabiston textbook of surgery: the biological basis of modern surgical practice ed.18 (Ed. 18). Philadelphia: Saunders.

Gaya MLA

Beauchamp, R., Daniel., Townsend, Courtney, M.. "Sabiston textbook of surgery: the biological basis of modern surgical practice ed.18". Ed. 18 Philadelphia: Saunders, 2008. Textbook.