APA (7th ed.) Citation

(1989). Devils Tower-Black Hills alkalic igneous rocks and general geology: Blacks [sic] Hills, South Dakota to Bear Lodge Mountains, Wyoming, July 1-7, 1989. American Geophysical Union.

Chicago Style (17th ed.) Citation

Devils Tower-Black Hills Alkalic Igneous Rocks and General Geology: Blacks [sic] Hills, South Dakota to Bear Lodge Mountains, Wyoming, July 1-7, 1989. Washington, D.C: American Geophysical Union, 1989.

MLA (9th ed.) Citation

Devils Tower-Black Hills Alkalic Igneous Rocks and General Geology: Blacks [sic] Hills, South Dakota to Bear Lodge Mountains, Wyoming, July 1-7, 1989. American Geophysical Union, 1989.

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