APA (7th ed.) Citation

Derocher, A. E. (1990). Supernumerary Mammae and Nipples in the Polar Bear (Ursus maritimus). Journal of Mammalogy, 71(2), 236.

Chicago Style (17th ed.) Citation

Derocher, A. E. "Supernumerary Mammae and Nipples in the Polar Bear (Ursus Maritimus)." Journal of Mammalogy 71, no. 2 (1990): 236.

MLA (9th ed.) Citation

Derocher, A. E. "Supernumerary Mammae and Nipples in the Polar Bear (Ursus Maritimus)." Journal of Mammalogy, vol. 71, no. 2, 1990, p. 236.