Dyfyniad APA

Montgomery, C. W. (2014). Environmental geology. New York: McGraw-Hill.

Dyfyniad Arddull Chicago

Montgomery, Carla W. Environmental Geology. New York: McGraw-Hill, 2014.

Dyfyniad MLA

Montgomery, Carla W. Environmental Geology. New York: McGraw-Hill, 2014.

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