Dyfyniad APA

Hill, M. k. (2004). Understanding environmental pollution (2nd ed.). Cambridge.

Dyfyniad Arddull Chicago

Hill, Marquita k. Understanding Environmental Pollution. 2nd ed. New Delhi: Cambridge, 2004.

Dyfyniad MLA

Hill, Marquita k. Understanding Environmental Pollution. 2nd ed. Cambridge, 2004.

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