Gaya APA

SAYRE, A, P. (2002). Secret of Sound : Studying the Calls annd Songs of Whales, Elephants, and Birds (Ed.3). Boston: Houghton Mifflin Company.

Gaya MLA

SAYRE, April, Pulley. "Secret of Sound : Studying the Calls annd Songs of Whales, Elephants, and Birds". Ed.3 Boston: Houghton Mifflin Company, 2002. Text.