Hall, C. A., & Holbrook, L. L. (2007). Introduction to the geology of southern California and its native plants. University of California Press.

Hall, Clarence A., and Lauri L. Holbrook. Introduction to the Geology of Southern California and Its Native Plants. Berkeley: University of California Press, 2007.

Hall, Clarence A., and Lauri L. Holbrook. Introduction to the Geology of Southern California and Its Native Plants. University of California Press, 2007.