APA (7th ed.) Citation

United States. National Park Service. (1981). Guadalupe Mountains National Park, Texas. The Service.

Chicago Style (17th ed.) Citation

United States. National Park Service. Guadalupe Mountains National Park, Texas. [Washington]: The Service, 1981.

MLA (9th ed.) Citation

United States. National Park Service. Guadalupe Mountains National Park, Texas. The Service, 1981.

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