Cita APA

Peterson, R. T. (1941). A field guide to western birds. Houghton Mifflin.

Citación estilo Chicago

Peterson, Roger Tory. A Field Guide to Western Birds. Houghton Mifflin, 1941.

Cita MLA

Peterson, Roger Tory. A Field Guide to Western Birds. Houghton Mifflin, 1941.

Warning: These citations may not always be 100% accurate.