APA (7th ed.) Citation

Kurtén, B. (1964). The evolution of the polar bear, Ursus Maritimus Phipps.

Chicago Style (17th ed.) Citation

Kurtén, Björn. The Evolution of the Polar Bear, Ursus Maritimus Phipps. Helsinki, 1964.

MLA (9th ed.) Citation

Kurtén, Björn. The Evolution of the Polar Bear, Ursus Maritimus Phipps. 1964.

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