APA (7th ed.) Citation

United States. National Park Service; Yellowstone Library and Museum Association. Guide to the Canyon Area.

Chicago Style (17th ed.) Citation

United States. National Park Service; Yellowstone Library and Museum Association. Guide to the Canyon Area.

MLA (9th ed.) Citation

United States. National Park Service; Yellowstone Library and Museum Association. Guide to the Canyon Area.

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