APA (7th ed.) Citation

Wyss, H. H. (1999). Hummingbirds: A portraits of the animal world. Todtri Book Publisher.

Chicago Style (17th ed.) Citation

Wyss, Hal H. Hummingbirds: A Portraits of the Animal World. New York: Todtri Book Publisher, 1999.

MLA (9th ed.) Citation

Wyss, Hal H. Hummingbirds: A Portraits of the Animal World. Todtri Book Publisher, 1999.

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