Dyfyniad APA

Smith,Kerry V. (1976). The economic consequences of air pollution. Ballinger Publishing Company.

Dyfyniad Arddull Chicago

Smith,Kerry V. The Economic Consequences of Air Pollution. Cambridge: Ballinger Publishing Company, 1976.

Dyfyniad MLA

Smith,Kerry V. The Economic Consequences of Air Pollution. Ballinger Publishing Company, 1976.

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