APA (7th ed.) Citation

United States. Forest Service. Rocky Mountain Region. (1988). Rio Grande National Forest, Colorado, 1975: Forest visitors map (Partial revision 1988.). The Office.

Chicago Style (17th ed.) Citation

United States. Forest Service. Rocky Mountain Region. Rio Grande National Forest, Colorado, 1975: Forest Visitors Map. Partial revision 1988. Denver, Colo.: The Office, 1988.

MLA (9th ed.) Citation

United States. Forest Service. Rocky Mountain Region. Rio Grande National Forest, Colorado, 1975: Forest Visitors Map. Partial revision 1988. The Office, 1988.