Dyfyniad APA
Sawyer, J. O. (2006). Northwest California: A natural history. University of California Press.
Dyfyniad Arddull Chicago
Sawyer, John O. Northwest California: A Natural History. Berkeley: University of California Press, 2006.
Dyfyniad MLA
Sawyer, John O. Northwest California: A Natural History. University of California Press, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.