APA (7th ed.) Citation

Howell, J. T. (1970). Marin flora: Manual of the flowering plants and ferns of Marin County, California (Second edition.). University of California Press.

Chicago Style (17th ed.) Citation

Howell, John Thomas. Marin Flora: Manual of the Flowering Plants and Ferns of Marin County, California. Second edition. Berkeley: University of California Press, 1970.

MLA (9th ed.) Citation

Howell, John Thomas. Marin Flora: Manual of the Flowering Plants and Ferns of Marin County, California. Second edition. University of California Press, 1970.