Gaya APA

brown, S, P. (2009). A Companion to Specialist Surgecial Practice Core Topics in General and Emergency Surgery (4th.ed). America: Elsever.

Gaya MLA

brown, Simon, Paterson-. "A Companion to Specialist Surgecial Practice Core Topics in General and Emergency Surgery". 4th.ed America: Elsever, 2009. Text.