APA (7th ed.) Citation

Roberts, R. J., Simons, F. S., & Irving, E. M. (1957). Mineral deposits of Central America. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Roberts, Ralph Jackson, Frank S. Simons, and Earl M. Irving. Mineral Deposits of Central America. [Washington, D.C.]: United States Department of the Interior, Geological Survey, 1957.

MLA (9th ed.) Citation

Roberts, Ralph Jackson, et al. Mineral Deposits of Central America. United States Department of the Interior, Geological Survey, 1957.