Dyfyniad APA

(1993). Constructed wetlands for water quality improvement. Boca Raton: Lewis Publishers.

Dyfyniad Arddull Chicago

Constructed Wetlands for Water Quality Improvement. Boca Raton: Lewis Publishers, 1993.

Dyfyniad MLA

Constructed Wetlands for Water Quality Improvement. Boca Raton: Lewis Publishers, 1993.

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