APA (7th ed.) Citation

Fridrich, C. J., & Kirkham, R. M. (2008). Preliminary geologic map of the Culebra Peak Area, Sangre de Cristo Mountains, Las Animas and Costilla Counties, Colorado (Version 1.0.). U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Fridrich, C. J., and Robert M. Kirkham. Preliminary Geologic Map of the Culebra Peak Area, Sangre De Cristo Mountains, Las Animas and Costilla Counties, Colorado. Version 1.0. [Reston, Va.]: U.S. Dept. of the Interior, U.S. Geological Survey, 2008.

MLA (9th ed.) Citation

Fridrich, C. J., and Robert M. Kirkham. Preliminary Geologic Map of the Culebra Peak Area, Sangre De Cristo Mountains, Las Animas and Costilla Counties, Colorado. Version 1.0. U.S. Dept. of the Interior, U.S. Geological Survey, 2008.