Gaya APA

Isselbacher, K, J. et al (1981). Harrison's Principles of Internal Medicine: Update I (9th ed). New York: Mc Graw-Hill Book.

Gaya MLA

Isselbacher, Kurt, J. et al. "Harrison's Principles of Internal Medicine: Update I". 9th ed New York: Mc Graw-Hill Book, 1981. print.