APA (7th ed.) Citation

Griffin, J. R., & Critchfield, W. B. (1972). The distribution of forest trees in California. USDA.

Chicago Style (17th ed.) Citation

Griffin, James R., and William B. Critchfield. The Distribution of Forest Trees in California. Berkeley: USDA, 1972.

MLA (9th ed.) Citation

Griffin, James R., and William B. Critchfield. The Distribution of Forest Trees in California. USDA, 1972.

Warning: These citations may not always be 100% accurate.