Dyfyniad APA

Clark, R. B., Frid, C., & Attrill, M. (1997). Marine pollution (4th ed.). Clarendon Press.

Dyfyniad Arddull Chicago

Clark, R. B., Chris Frid, and Martin Attrill. Marine Pollution. 4th ed. Oxford: Clarendon Press, 1997.

Dyfyniad MLA

Clark, R. B., et al. Marine Pollution. 4th ed. Clarendon Press, 1997.

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