Gaya APA

Ballenger, J, J., Snow, J, B. (1995). Otorhinolaryngology: Head and neck surgery (15th. Ed). United States of America: Lippincott Williams & Wilkins.

Gaya MLA

Ballenger, John, Jacob., Snow, James, B.. "Otorhinolaryngology: Head and neck surgery". 15th. Ed United States of America: Lippincott Williams & Wilkins, 1995. Text.