Dyfyniad APA

World Health Organization United Nations Environment Programme. (1991). Surface water drainage for low-income communities. World Health Organization in collaboration with the United Nations Environment Programme.

Dyfyniad Arddull Chicago

World Health Organization United Nations Environment Programme. Surface Water Drainage for Low-income Communities. Geneva: World Health Organization in collaboration with the United Nations Environment Programme, 1991.

Dyfyniad MLA

World Health Organization United Nations Environment Programme. Surface Water Drainage for Low-income Communities. World Health Organization in collaboration with the United Nations Environment Programme, 1991.

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