Dyfyniad APA

Stern , A. C.. (1977). Air pollution (3rd ed.). Academic press.

Dyfyniad Arddull Chicago

Stern , Arthur C. Air Pollution. 3rd ed. New York: Academic press, 1977.

Dyfyniad MLA

Stern , Arthur C. Air Pollution. 3rd ed. Academic press, 1977.

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