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.
Atenció: Aquestes cites poden no estar 100% correctes.