Marshall, C. H. (1956). Photogeologic map of the Virgin NE quadrangle, Washington County, Utah. U.S. Geological Survey.
Chicago Style (17th ed.) CitationMarshall, C. H. Photogeologic Map of the Virgin NE Quadrangle, Washington County, Utah. Washington, D.C.: U.S. Geological Survey, 1956.
MLA (9th ed.) CitationMarshall, C. H. Photogeologic Map of the Virgin NE Quadrangle, Washington County, Utah. U.S. Geological Survey, 1956.
Warning: These citations may not always be 100% accurate.