Dyfyniad APA
Hill, M. (2006). Geology of the Sierra Nevada (Rev. ed.). University of California Press.
Dyfyniad Arddull Chicago
Hill, Mary. Geology of the Sierra Nevada. Rev. ed. Berkeley: University of California Press, 2006.
Dyfyniad MLA
Hill, Mary. Geology of the Sierra Nevada. Rev. ed. University of California Press, 2006.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.