APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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