Dyfyniad APA

Orgasnisation for Economic Co-operation and Development. (1980). Environment policies for the 1980s. OECD.

Dyfyniad Arddull Chicago

Orgasnisation for Economic Co-operation and Development. Environment Policies for the 1980s. Paris: OECD, 1980.

Dyfyniad MLA

Orgasnisation for Economic Co-operation and Development. Environment Policies for the 1980s. OECD, 1980.

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