APA (7th ed.) Citation

Leach, N., & Huey, G. H. H. (1992). The guide to national parks of the Southwest. Southwest Parks & Monuments Association.

Chicago Style (17th ed.) Citation

Leach, Nicky, and George H. H. Huey. The Guide to National Parks of the Southwest. Tucson, Ariz.: Southwest Parks & Monuments Association, 1992.

MLA (9th ed.) Citation

Leach, Nicky, and George H. H. Huey. The Guide to National Parks of the Southwest. Southwest Parks & Monuments Association, 1992.