Dyfyniad APA

(1990). Environmental education and sustainable development. Indian Environmental Socienty.

Dyfyniad Arddull Chicago

Environmental Education and Sustainable Development. New Delhi: Indian Environmental Socienty, 1990.

Dyfyniad MLA

Environmental Education and Sustainable Development. Indian Environmental Socienty, 1990.

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