Dyfyniad APA

Organisation for Economic Co-operation and Development & ProQuest (Firm). (2009). Examens environnementaux de l'OCDE. OCDE.

Dyfyniad Arddull Chicago

Organisation for Economic Co-operation and Development and ProQuest (Firm). Examens Environnementaux De L'OCDE. Paris: OCDE, 2009.

Dyfyniad MLA

Organisation for Economic Co-operation and Development and ProQuest (Firm). Examens Environnementaux De L'OCDE. OCDE, 2009.

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