APA (7th ed.) Citation

Geological Survey (U.S.), Watts, K. C., & Hassemer, J. R. (1988). Geochemical interpretive and summary maps, Silver City 1?x 2?quadrangle, New Mexico and Arizona. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), K. C. Watts, and Jerry R. Hassemer. Geochemical Interpretive and Summary Maps, Silver City 1?x 2?quadrangle, New Mexico and Arizona. Reston, Va.: The Survey, 1988.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Geochemical Interpretive and Summary Maps, Silver City 1?x 2?quadrangle, New Mexico and Arizona. The Survey, 1988.