Dyfyniad APA

International Bank for Reconstruction and Development. Environment Department. (1991). Environmental assessment sourcebook. World Bank.

Dyfyniad Arddull Chicago

International Bank for Reconstruction and Development. Environment Department. Environmental Assessment Sourcebook. Washington: World Bank, 1991.

Dyfyniad MLA

International Bank for Reconstruction and Development. Environment Department. Environmental Assessment Sourcebook. World Bank, 1991.

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