Christopher's textbook of surgery
MLA
Christopher, Frederick, and Loyal Davis. Christopher's Textbook of Surgery. 9th ed. Philadelphia, Pa: Saunders, 1968.
APA
Christopher, F., & Davis, L. (1968). Christopher's textbook of surgery. 9th ed. Philadelphia, Pa: Saunders.
Chicago
Christopher, Frederick, Christopher's Textbook of Surgery. Edited by Loyal Davis. 9th ed. Philadelphia, Pa: Saunders, 1968.