APA Style

Greenberger, N, J. et al (2009). Current diagnosis & treatment : gastroenterology, hepatology & endoscopy . New York: Lange Medical Books/McGraw-Hill Medical.

MLA Style

Greenberger, Norton, J.. et al. "Current diagnosis & treatment : gastroenterology, hepatology & endoscopy". New York: Lange Medical Books/McGraw-Hill Medical, 2009. Text.