Cita APA (7a ed.)

Thorington, R. W., & Ferrell, K. (2006). Squirrels: The Animal Answer Guide. Johns Hopkins University Press.

Cita Chicago Style (17a ed.)

Thorington, Richard W., y Katie Ferrell. Squirrels: The Animal Answer Guide. Baltimore: Johns Hopkins University Press, 2006.

Cita MLA (8a ed.)

Thorington, Richard W., y Katie Ferrell. Squirrels: The Animal Answer Guide. Johns Hopkins University Press, 2006.