Dyfyniad APA

Mason, C. (2002). Biology of freshwater pollution (4th ed.). Prentice-Hall of India.

Dyfyniad Arddull Chicago

Mason, Christopher. Biology of Freshwater Pollution. 4th ed. London: Prentice-Hall of India, 2002.

Dyfyniad MLA

Mason, Christopher. Biology of Freshwater Pollution. 4th ed. Prentice-Hall of India, 2002.

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