Cita APA (7th ed.)

Longo, D. L. (2012). Harrison's principles of internal medicine (18th ed.). McGraw-Hill.

Cita Chicago (17th ed.)

Longo, Dan L. Harrison's Principles of Internal Medicine. 18th ed. New York: McGraw-Hill, 2012.

Cita MLA (9th ed.)

Longo, Dan L. Harrison's Principles of Internal Medicine. 18th ed. McGraw-Hill, 2012.