Dyfyniad APA

Bridgman, H. A. Global air pollution problems for the 1990s. John Wiley and Sons.

Dyfyniad Arddull Chicago

Bridgman, Howard A. Global Air Pollution Problems for the 1990s. John Wiley and Sons.

Dyfyniad MLA

Bridgman, Howard A. Global Air Pollution Problems for the 1990s. John Wiley and Sons.

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