APA (7th ed.) Citation

Pierce, K. L., & Schmidt, P. W. (1975). Reconnaissance map showing relative amounts of soil and bedrock in the mountainous part of the Eldorado Springs quadrangle, Boulder and Jefferson Counties, Colorado. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Pierce, Kenneth L., and Paul W. Schmidt. Reconnaissance Map Showing Relative Amounts of Soil and Bedrock in the Mountainous Part of the Eldorado Springs Quadrangle, Boulder and Jefferson Counties, Colorado. [Reston, Va.]: U.S. Geological Survey, 1975.

MLA (9th ed.) Citation

Pierce, Kenneth L., and Paul W. Schmidt. Reconnaissance Map Showing Relative Amounts of Soil and Bedrock in the Mountainous Part of the Eldorado Springs Quadrangle, Boulder and Jefferson Counties, Colorado. U.S. Geological Survey, 1975.