APA (7th ed.) Citation

Longo, D. L., & Harrison, T. R. (2011). Harrison's principles of internal medicine (Eighteenth edition.). McGraw-Hill.

Chicago Style (17th ed.) Citation

Longo, Dan L., and Tinsley Randolph Harrison. Harrison's Principles of Internal Medicine. Eighteenth edition. New York: McGraw-Hill, 2011.

MLA (9th ed.) Citation

Longo, Dan L., and Tinsley Randolph Harrison. Harrison's Principles of Internal Medicine. Eighteenth edition. McGraw-Hill, 2011.