APA (7th ed.) Citation

Billingsley, G. H., Felger, T. J., & Priest, S. S. (2006). Geologic map of the Valle 30ʹ x 60ʹ quadrangle, Coconino County, northern Arizona (Version 1.0.). U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Billingsley, George H., Tracey J. Felger, and Susan S. Priest. Geologic Map of the Valle 30ʹ X 60ʹ Quadrangle, Coconino County, Northern Arizona. Version 1.0. Flagstaff, Ariz.: U.S. Dept. of the Interior, U.S. Geological Survey, 2006.

MLA (9th ed.) Citation

Billingsley, George H., et al. Geologic Map of the Valle 30ʹ X 60ʹ Quadrangle, Coconino County, Northern Arizona. Version 1.0. U.S. Dept. of the Interior, U.S. Geological Survey, 2006.