APA (7th ed.) Citation

Stirling, I., & Guravich, D. (1998). Polar bears. University of Michigan Press.

Chicago Style (17th ed.) Citation

Stirling, Ian, and Dan Guravich. Polar Bears. Ann Arbor: University of Michigan Press, 1998.

MLA (9th ed.) Citation

Stirling, Ian, and Dan Guravich. Polar Bears. University of Michigan Press, 1998.