Gaya APA

Greenberger, N, J. et al (2009). Current Diagnosis & Treatment : Gastroenterology, Hepatology, & Endoscopy . : McGrawHill.

Gaya MLA

Greenberger, Norton, J.. et al. "Current Diagnosis & Treatment : Gastroenterology, Hepatology, & Endoscopy". : McGrawHill, 2009. Text.