Dyfyniad APA
Manahan, S. E. (1999). Environmental chemistry (7th ed.). Lewis Pub.
Dyfyniad Arddull Chicago
Manahan, Stanley E. Environmental Chemistry. 7th ed. New York: Lewis Pub, 1999.
Dyfyniad MLA
Manahan, Stanley E. Environmental Chemistry. 7th ed. Lewis Pub, 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.