APA (7th ed.) Citation

Geological Survey (U.S.), Condit, C. D., Crumpler, L. S., & Aubele, J. C. (1999). Lithologic, age group, magnetopolarity, and geochemical maps of the Springerville volcanic field, east-central Arizona. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.), Christopher D. Condit, Larry S. Crumpler, and J. C. Aubele. Lithologic, Age Group, Magnetopolarity, and Geochemical Maps of the Springerville Volcanic Field, East-central Arizona. Reston, VA: The Survey, 1999.

MLA (9th ed.) Citation

Geological Survey (U.S.), et al. Lithologic, Age Group, Magnetopolarity, and Geochemical Maps of the Springerville Volcanic Field, East-central Arizona. The Survey, 1999.