Cita APA

Cassie, B. 1. (1999). National Audubon Society first field guide, trees. New York: Scholastic Inc..

Citación estilo Chicago

Cassie, Brian 1953-. National Audubon Society First Field Guide, Trees. New York: Scholastic Inc., 1999.

Cita MLA

Cassie, Brian 1953-. National Audubon Society First Field Guide, Trees. New York: Scholastic Inc., 1999.