APA Style

Ling, F, W., Duff, P. (2002). Pocket guide for obstetrics and gynecology : principles for practice . New York: McGraw-Hill Education.

MLA Style

Ling, Frank, W.., Duff, Patrick. "Pocket guide for obstetrics and gynecology : principles for practice". New York: McGraw-Hill Education, 2002. Text.