Dyfyniad APA

Williams, P. T. (2005). Waste treatment and disposal (Second edition.). John Wiley.

Dyfyniad Arddull Chicago

Williams, Paul T. Waste Treatment and Disposal. Second edition. Chichester: John Wiley, 2005.

Dyfyniad MLA

Williams, Paul T. Waste Treatment and Disposal. Second edition. John Wiley, 2005.

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