APA (7th ed.) Citation

Hill, D. R., & Tomkin, J. M. (1953). General and engineering geology of the Wray area, Colorado and Nebraska. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Hill, Dorothy Rachel, and Jessie M. Tomkin. General and Engineering Geology of the Wray Area, Colorado and Nebraska. Washington, D.C.: United States Department of the Interior, Geological Survey, 1953.

MLA (9th ed.) Citation

Hill, Dorothy Rachel, and Jessie M. Tomkin. General and Engineering Geology of the Wray Area, Colorado and Nebraska. United States Department of the Interior, Geological Survey, 1953.