APA (7th ed.) Citation

Harwood, D. S., & Helley, E. J. (1987). Late Cenozoic tectonism of the Sacramento Valley, California. Department of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Harwood, David S., and Edward J. Helley. Late Cenozoic Tectonism of the Sacramento Valley, California. Washington: Department of the Interior, U.S. Geological Survey, 1987.

MLA (9th ed.) Citation

Harwood, David S., and Edward J. Helley. Late Cenozoic Tectonism of the Sacramento Valley, California. Department of the Interior, U.S. Geological Survey, 1987.