APA (7th ed.) Citation

Ellefsen, K., Lucius, J. E., & Fitterman, D. V. (1998). An evaluation of several geophysical methods for characterizing sand and gravel deposits. U.S. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Ellefsen, Karl, Jeffrey E. Lucius, and David V. Fitterman. An Evaluation of Several Geophysical Methods for Characterizing Sand and Gravel Deposits. Denver, CO: U.S. Department of the Interior, U.S. Geological Survey, 1998.

MLA (9th ed.) Citation

Ellefsen, Karl, et al. An Evaluation of Several Geophysical Methods for Characterizing Sand and Gravel Deposits. U.S. Department of the Interior, U.S. Geological Survey, 1998.