Montgomery, C. W. (2014). Environmental geology. New York: McGraw-Hill.
Dyfyniad Arddull ChicagoMontgomery, Carla W. Environmental Geology. New York: McGraw-Hill, 2014.
Dyfyniad MLAMontgomery, Carla W. Environmental Geology. New York: McGraw-Hill, 2014.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.