Dyfyniad APA

(2001). Extended producer responsibility: A guidance manual for governments. OECD Publications Services.

Dyfyniad Arddull Chicago

Extended Producer Responsibility: A Guidance Manual for Governments. Paris, France: OECD Publications Services, 2001.

Dyfyniad MLA

Extended Producer Responsibility: A Guidance Manual for Governments. OECD Publications Services, 2001.

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