Gaya APA

Sayre, April Pulley. (2002). Secrets of Sound : Studying the Calls and Songs of Whales, Elephants, and Birds . Singapura: Houghton Mifflin Company.

Gaya Chicago

Sayre, April Pulley. Secrets of Sound : Studying the Calls and Songs of Whales, Elephants, and Birds. Singapura: Houghton Mifflin Company, 2002. Text.

Gaya MLA

Sayre, April Pulley. Secrets of Sound : Studying the Calls and Songs of Whales, Elephants, and Birds. Singapura: Houghton Mifflin Company, 2002. Text.

Gaya Turabian

Sayre, April Pulley. Secrets of Sound : Studying the Calls and Songs of Whales, Elephants, and Birds. Singapura: Houghton Mifflin Company, 2002. Print.