Cita APA (7a ed.)
California Field Ornithologists & Western Field Ornithologists. (1973). Western birds. California Field Ornithologists.
Cita Chicago Style (17a ed.)
California Field Ornithologists y Western Field Ornithologists. Western Birds. [Del Mar, Calif.?]: California Field Ornithologists, 1973.
Cita MLA (9a ed.)
California Field Ornithologists y Western Field Ornithologists. Western Birds. California Field Ornithologists, 1973.
Precaución: Estas citas no son 100% exactas.