Dyfyniad APA

Hill, M. k. (1997). Understanding Environmental Pollution. Cambridge University Press.

Dyfyniad Arddull Chicago

Hill, Marquita k. Understanding Environmental Pollution. Cambridge: Cambridge University Press, 1997.

Dyfyniad MLA

Hill, Marquita k. Understanding Environmental Pollution. Cambridge University Press, 1997.

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