APA (7th ed.) Citation

World Wildlife Fund, Lowe, D. W., Matthews, J. R., & Moseley, C. J. (1990). The Official World Wildlife Fund guide to endangered species of North America. Beacham Pub..

Chicago Style (17th ed.) Citation

World Wildlife Fund, David W. Lowe, John R. Matthews, and Charles J. Moseley. The Official World Wildlife Fund Guide to Endangered Species of North America. Washington, D.C.: Beacham Pub., 1990.

MLA (9th ed.) Citation

World Wildlife Fund, et al. The Official World Wildlife Fund Guide to Endangered Species of North America. Beacham Pub., 1990.