APA (7th ed.) Citation

Aars, J., Vongraven, D., Andersen, M., & Skoglund, A. (2008). Polar bear: Ursus Maritimus.

Chicago Style (17th ed.) Citation

Aars, Jon, Dag Vongraven, Magnus Andersen, and A. Skoglund. Polar Bear: Ursus Maritimus. 2008.

MLA (9th ed.) Citation

Aars, Jon, et al. Polar Bear: Ursus Maritimus. 2008.