APA (7th ed.) Citation

Singer, D. A., Cox, D. P., Drew, L. J., & Chaffee, M. A. (1975). Grade and tonnage relationships among copper deposits. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Singer, D. A., Dennis P. Cox, Lawrence J. Drew, and Maurice A. Chaffee. Grade and Tonnage Relationships Among Copper Deposits. Washington: United States Department of the Interior, Geological Survey, 1975.

MLA (9th ed.) Citation

Singer, D. A., et al. Grade and Tonnage Relationships Among Copper Deposits. United States Department of the Interior, Geological Survey, 1975.