APA (7th ed.) Citation

Geological Survey (U.S.) & Powell, C. L. (2007). Age, stratigraphy, and correlation of the late Neogene Purisima Formation, central California coast ranges. U.S. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and Charles L. Powell. Age, Stratigraphy, and Correlation of the Late Neogene Purisima Formation, Central California Coast Ranges. Reston, Va.: U.S. Dept. of the Interior, U.S. Geological Survey, 2007.

MLA (9th ed.) Citation

Geological Survey (U.S.) and Charles L. Powell. Age, Stratigraphy, and Correlation of the Late Neogene Purisima Formation, Central California Coast Ranges. U.S. Dept. of the Interior, U.S. Geological Survey, 2007.