एपीए उद्धरण

(1931). Aquatic Mammals. Their Adaptation to Life in the Water.

शिकागो स्टाइल उद्धरण

Aquatic Mammals. Their Adaptation to Life in the Water. 1931.

एमएलए उद्धरण

Aquatic Mammals. Their Adaptation to Life in the Water. 1931.