APA (7th ed.) Citation

Marshall, C. H. (1955). Photogeologic map of the Clay Hills-7 quadrangle, San Juan County, Utah. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Marshall, C. H. Photogeologic Map of the Clay Hills-7 Quadrangle, San Juan County, Utah. Washington, D.C.: U.S. Geological Survey, 1955.

MLA (9th ed.) Citation

Marshall, C. H. Photogeologic Map of the Clay Hills-7 Quadrangle, San Juan County, Utah. U.S. Geological Survey, 1955.