Dyfyniad APA

Organisation for Economic Co-operation and Development & ProQuest (Firm). (2010). OECD environmental performance reviews. OECD.

Dyfyniad Arddull Chicago

Organisation for Economic Co-operation and Development and ProQuest (Firm). OECD Environmental Performance Reviews. Paris, France: OECD, 2010.

Dyfyniad MLA

Organisation for Economic Co-operation and Development and ProQuest (Firm). OECD Environmental Performance Reviews. OECD, 2010.

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