Cita APA (7a ed.)

Harrison, T. R., & Thorn, G. W. (1977). Harrison's principles of internal medicine (8th ed.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Harrison, Tinsley Randolph, y George Widmer Thorn. Harrison's Principles of Internal Medicine. 8th ed. New York [etc.]: McGraw-Hill, 1977.

Cita MLA (9a ed.)

Harrison, Tinsley Randolph, y George Widmer Thorn. Harrison's Principles of Internal Medicine. 8th ed. McGraw-Hill, 1977.