Dyfyniad APA

(1980). Pollution engineering. Technical Publishing.

Dyfyniad Arddull Chicago

Pollution Engineering. New York: Technical Publishing, 1980.

Dyfyniad MLA

Pollution Engineering. Technical Publishing, 1980.

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