Gaya APA

LONGO, D, L., FAUCI, A, S. (2013). (E) Harrisons's Gastroenterology and Hepatology (ed 2). : McGraw-Hill Education.

Gaya MLA

LONGO, DAN, L.., FAUCI, ANTHONY, S.. "(E) Harrisons's Gastroenterology and Hepatology". ed 2 : McGraw-Hill Education, 2013. Text.