North American birds.
APA Citation
National Audubon Society., American Birding Association. (1999). North American birds. Colorado Springs, CO: American Birding Association in alliance with the National Audubon Society.
MLA Citation
National Audubon Society, and American Birding Association. North American Birds. Colorado Springs, CO: American Birding Association in alliance with the National Audubon Society, 1999.
Warning: These citations may not always be complete (especially for serials).