United States. National Park Service; Yellowstone Library and Museum Association. Guide to the Canyon Area.
Chicago Style (17th ed.) CitationUnited States. National Park Service; Yellowstone Library and Museum Association. Guide to the Canyon Area.
MLA (9th ed.) CitationUnited States. National Park Service; Yellowstone Library and Museum Association. Guide to the Canyon Area.
Warning: These citations may not always be 100% accurate.