ebrary, Inc, Barbour, M. G., Keeler-Wolf, T., & Schoenherr, A. A. (2007). Terrestrial vegetation of California (3rd ed.). University of California Press.

ebrary, Inc, Michael G. Barbour, Todd Keeler-Wolf, and Allan A. Schoenherr. Terrestrial Vegetation of California. 3rd ed. Berkeley: University of California Press, 2007.

ebrary, Inc, et al. Terrestrial Vegetation of California. 3rd ed. University of California Press, 2007.