Geological Survey (U.S.), Billingsley, G. H., & Workman, J. B. (2000). Geologic map of the Littlefield 30ʹ x 60ʹ quadrangle, Mohave County, northwestern Arizona. The Survey.
Chicago Style (17th ed.) CitationGeological Survey (U.S.), George H. Billingsley, and Jeremiah B. Workman. Geologic Map of the Littlefield 30ʹ X 60ʹ Quadrangle, Mohave County, Northwestern Arizona. Reston, VA: The Survey, 2000.
MLA (9th ed.) CitationGeological Survey (U.S.), et al. Geologic Map of the Littlefield 30ʹ X 60ʹ Quadrangle, Mohave County, Northwestern Arizona. The Survey, 2000.
Warning: These citations may not always be 100% accurate.