Dyfyniad APA

Organisation for Economic Co-operation and Development. (1979). The state of the environment in OECD member countries. OECD.

Dyfyniad Arddull Chicago

Organisation for Economic Co-operation and Development. The State of the Environment in OECD Member Countries. Paris: OECD, 1979.

Dyfyniad MLA

Organisation for Economic Co-operation and Development. The State of the Environment in OECD Member Countries. OECD, 1979.

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