Clark, R. (1997). Marine pollution (4th ed.). Oxford University.
Dyfyniad Arddull ChicagoClark, R.B. Marine Pollution. 4th ed. New York: Oxford University, 1997.
Dyfyniad MLAClark, R.B. Marine Pollution. 4th ed. Oxford University, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.