APA (7th ed.) Citation

Sonoran Desert Field Station (Tucson, Ariz.), Halvorson, W. L., & Gebow, B. S. (2000). Floristic surveys of Saguaro National Park protected natural areas. United States Geological Survey, Sonoran Desert Field Station, School of Renewable Natural Resources.

Chicago Style (17th ed.) Citation

Sonoran Desert Field Station (Tucson, Ariz.), William L. Halvorson, and Brooke S. Gebow. Floristic Surveys of Saguaro National Park Protected Natural Areas. Tucson, Ariz.: United States Geological Survey, Sonoran Desert Field Station, School of Renewable Natural Resources, 2000.

MLA (9th ed.) Citation

Sonoran Desert Field Station (Tucson, Ariz.), et al. Floristic Surveys of Saguaro National Park Protected Natural Areas. United States Geological Survey, Sonoran Desert Field Station, School of Renewable Natural Resources, 2000.