APA Citation

Proctor, G. R. (1989). Ferns of Puerto Rico and the Virgin Islands. New York: The New York Botanical Garden.

Chicago Style Citation

Proctor, George R. Ferns of Puerto Rico and the Virgin Islands. New York: The New York Botanical Garden, 1989.

MLA Citation

Proctor, George R. Ferns of Puerto Rico and the Virgin Islands. New York: The New York Botanical Garden, 1989.

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