Cita APA (7a ed.)

Nowak, R. M., & Walker, E. P. (1999). Walker's mammals of the world (6th ed.). The Johns Hopkins University Press.

Cita Chicago Style (17a ed.)

Nowak, Ronald M., y Ernest P. Walker. Walker's Mammals of the World. 6th ed. Baltimore: The Johns Hopkins University Press, 1999.

Cita MLA (8a ed.)

Nowak, Ronald M., y Ernest P. Walker. Walker's Mammals of the World. 6th ed. The Johns Hopkins University Press, 1999.