Dyfyniad APA

(2001). Ecological economics for sustainable development. Academic Foundation.

Dyfyniad Arddull Chicago

Ecological Economics for Sustainable Development. Delhi: Academic Foundation, 2001.

Dyfyniad MLA

Ecological Economics for Sustainable Development. Academic Foundation, 2001.

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