APA (7th ed.) Citation

(2018). Coal vein: A guided nature trail. National Park Service, U.S. Department of the Interior.

Chicago Style (17th ed.) Citation

Coal Vein: A Guided Nature Trail. [Washington, D.C.]: National Park Service, U.S. Department of the Interior, 2018.

MLA (9th ed.) Citation

Coal Vein: A Guided Nature Trail. National Park Service, U.S. Department of the Interior, 2018.

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