APA (7th ed.) Citation

Stonehouse, B. (1985). Sea mammals of the world. Penguin.

Chicago Style (17th ed.) Citation

Stonehouse, Bernard. Sea Mammals of the World. Harmondsworth, Middlesex, England: Penguin, 1985.

MLA (9th ed.) Citation

Stonehouse, Bernard. Sea Mammals of the World. Penguin, 1985.

Warning: These citations may not always be 100% accurate.