Dyfyniad APA

(1992). Waste treatment and recycling: Course materials. School of biological and environmental sciences.

Dyfyniad Arddull Chicago

Waste Treatment and Recycling: Course Materials. School of biological and environmental sciences, 1992.

Dyfyniad MLA

Waste Treatment and Recycling: Course Materials. School of biological and environmental sciences, 1992.

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