APA (7th ed.) Citation

Piper, A. M., Gale, H. S., Robinson, T. W., & Thomas, H. E. (1939). Geology and ground-water hydrology of the Mokelumne area, California. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Piper, Arthur M., Hoyt S. Gale, T. W. Robinson, and H. E. Thomas. Geology and Ground-water Hydrology of the Mokelumne Area, California. [Washington, D.C.]: United States Department of the Interior, Geological Survey, 1939.

MLA (9th ed.) Citation

Piper, Arthur M., et al. Geology and Ground-water Hydrology of the Mokelumne Area, California. United States Department of the Interior, Geological Survey, 1939.