Dyfyniad APA

Organisation for Economic Co-operation and Development. (1981). United Kingdom: 1981. OECD Publishing.

Dyfyniad Arddull Chicago

Organisation for Economic Co-operation and Development. United Kingdom: 1981. Paris: OECD Publishing, 1981.

Dyfyniad MLA

Organisation for Economic Co-operation and Development. United Kingdom: 1981. OECD Publishing, 1981.

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