APA Style

Shoemaker, W., Ayres, S. (1989). Textbook of Critical Care: The Society of Critical Care Medicine (2nd.ed). Philadelphia: W.B. Saunders.

MLA Style

Shoemaker, William., Ayres, Stephen. "Textbook of Critical Care: The Society of Critical Care Medicine". 2nd.ed Philadelphia: W.B. Saunders, 1989. print.