APA (7th ed.) Citation

Ericksen, G. E., Fernández Concha, J., & Plafker, G. (1970). Preliminary report on the geologic events associated with the May 31, 1970, Peru earthquake. United States Department of the Interior, Geological Survey.

Chicago Style (17th ed.) Citation

Ericksen, George Edward, Jaime Fernández Concha, and George Plafker. Preliminary Report on the Geologic Events Associated with the May 31, 1970, Peru Earthquake. Washington: United States Department of the Interior, Geological Survey, 1970.

MLA (9th ed.) Citation

Ericksen, George Edward, et al. Preliminary Report on the Geologic Events Associated with the May 31, 1970, Peru Earthquake. United States Department of the Interior, Geological Survey, 1970.