Cita APA (7a ed.)

Project Muse, Collins, S. L., & VanDeWalle, T. (2011). Frogs and Toads in Your Pocket: A Guide to Amphibians of the Upper Midwest. University of Iowa Press.

Cita Chicago Style (17a ed.)

Project Muse, Suzanne L. Collins, y Terry VanDeWalle. Frogs and Toads in Your Pocket: A Guide to Amphibians of the Upper Midwest. [Iowa City, Iowa]: University of Iowa Press, 2011.

Cita MLA (8a ed.)

Project Muse, et al. Frogs and Toads in Your Pocket: A Guide to Amphibians of the Upper Midwest. University of Iowa Press, 2011.