Dyfyniad APA

Pratt, A. (1978). Directory of Waste Disposal and Recovery. Geprge Godwin.

Dyfyniad Arddull Chicago

Pratt, Alan. Directory of Waste Disposal and Recovery. London: Geprge Godwin, 1978.

Dyfyniad MLA

Pratt, Alan. Directory of Waste Disposal and Recovery. Geprge Godwin, 1978.

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