Gaya APA

longo, D, L., kasper, D, L. (2012). Harrison's Principles of Internal Medicine Vol. 1 (18). [s.i.]: McGraw-Hill.

Gaya MLA

longo, Dan, L.., kasper, Dennis, L.. "Harrison's Principles of Internal Medicine Vol. 1". 18 [s.i.]: McGraw-Hill, 2012. Text.