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.