Gaya APA

Kasper, D, L., Fauci, A, S. (2015). Harrison's Principles of Internal Medicine Volume 1 (19). USA: Mc Graw Hill.

Gaya MLA

Kasper, Dennis, L.., Fauci, Anthony, S.. "Harrison's Principles of Internal Medicine Volume 1". 19 USA: Mc Graw Hill, 2015. Text.