Cita APA (7th ed.)

Sawyer, J. O. (2006). Northwest California: A natural history. University of California Press.

Cita Chicago (17th ed.)

Sawyer, John O. Northwest California: A Natural History. Berkeley: University of California Press, 2006.

Cita MLA (9th ed.)

Sawyer, John O. Northwest California: A Natural History. University of California Press, 2006.