Dyfyniad APA

(1997). Health and environment in sustainable development: Five years after the earth summit. UNEP.

Dyfyniad Arddull Chicago

Health and Environment in Sustainable Development: Five Years After the Earth Summit. Ginebra: UNEP, 1997.

Dyfyniad MLA

Health and Environment in Sustainable Development: Five Years After the Earth Summit. UNEP, 1997.

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