APA (7th ed.) Citation

Knudtson, P. M. (1998). The nature of walruses: White-tusked wanderers of the sea. Greystone Books.

Chicago Style (17th ed.) Citation

Knudtson, Peter M. The Nature of Walruses: White-tusked Wanderers of the Sea. Vancouver: Greystone Books, 1998.

MLA (9th ed.) Citation

Knudtson, Peter M. The Nature of Walruses: White-tusked Wanderers of the Sea. Greystone Books, 1998.