Dyfyniad APA

(1983). Glossary of environmental education terms. International Environmental Education Programme, Unesco-Unep.

Dyfyniad Arddull Chicago

Glossary of Environmental Education Terms. [S.l.]: International Environmental Education Programme, Unesco-Unep, 1983.

Dyfyniad MLA

Glossary of Environmental Education Terms. International Environmental Education Programme, Unesco-Unep, 1983.

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