Cita APA (7a ed.)

Gardner, D., & Overcott, N. (2006). Fifty Common Birds of the Upper Midwest. University of Iowa Press.

Cita Chicago Style (17a ed.)

Gardner, Dana, y Nancy Overcott. Fifty Common Birds of the Upper Midwest. Iowa City: University of Iowa Press, 2006.

Cita MLA (8a ed.)

Gardner, Dana, y Nancy Overcott. Fifty Common Birds of the Upper Midwest. University of Iowa Press, 2006.