Gaya APA

Longo, D, L., Fauci, A, S. (2010). Harrison's : Gastroenterology and Hepatology . : Mc Graw Hill.

Gaya MLA

Longo, Dan, L.., Fauci, Antony, S.. "Harrison's : Gastroenterology and Hepatology". : Mc Graw Hill, 2010. Text.