APA (7th ed.) Citation

Stirling, I., & Derocher, A. (1993). Possible Impacts of Climatic Warming on Polar Bears.

Chicago Style (17th ed.) Citation

Stirling, I., and A.E Derocher. Possible Impacts of Climatic Warming on Polar Bears. 1993.

MLA (9th ed.) Citation

Stirling, I., and A.E Derocher. Possible Impacts of Climatic Warming on Polar Bears. 1993.

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