APA (7th ed.) Citation

United States. Forest Service. (1998). Time travel through Toadstool Geologic Park. U.S. Dept. of Agriculture, Forest Service.

Chicago Style (17th ed.) Citation

United States. Forest Service. Time Travel Through Toadstool Geologic Park. [Washington, D.C.?]: U.S. Dept. of Agriculture, Forest Service, 1998.

MLA (9th ed.) Citation

United States. Forest Service. Time Travel Through Toadstool Geologic Park. U.S. Dept. of Agriculture, Forest Service, 1998.