APA (7th ed.) Citation

United States. Forest Service. (1984). Road design system. USDA, Forest Service.

Chicago Style (17th ed.) Citation

United States. Forest Service. Road Design System. [Washington, D.C.?]: USDA, Forest Service, 1984.

MLA (9th ed.) Citation

United States. Forest Service. Road Design System. USDA, Forest Service, 1984.

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