Dyfyniad APA

(2013). A DICTIONARY of geology and earth sciences. Oxford University Press.

Dyfyniad Arddull Chicago

A DICTIONARY of Geology and Earth Sciences. Oxford University Press, 2013.

Dyfyniad MLA

A DICTIONARY of Geology and Earth Sciences. Oxford University Press, 2013.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.