APA-Zitierstil (7. Ausg.)

Little, E. L. (1988). The Audubon Society field guide to North American trees: Western region (Sixth printing.). Knopf.

Chicago-Zitierstil (17. Ausg.)

Little, Elbert L. The Audubon Society Field Guide to North American Trees: Western Region. Sixth printing. New York: Knopf, 1988.

MLA-Zitierstil (9. Ausg.)

Little, Elbert L. The Audubon Society Field Guide to North American Trees: Western Region. Sixth printing. Knopf, 1988.