APA (7th ed.) Citation

Carwardine, M. (1998). Whales and dolphins: The ultimate guide to marine mammals. Harper Collins publishers.

Chicago Style (17th ed.) Citation

Carwardine, Mark. Whales and Dolphins: The Ultimate Guide to Marine Mammals. London: Harper Collins publishers, 1998.

MLA (9th ed.) Citation

Carwardine, Mark. Whales and Dolphins: The Ultimate Guide to Marine Mammals. Harper Collins publishers, 1998.