Gaya APA

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

Gaya MLA

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