Dyfyniad APA

International Union for Conservation of Nature and Natural Resources & World Bank. (1992). World Bank environment paper. World Bank.

Dyfyniad Arddull Chicago

International Union for Conservation of Nature and Natural Resources and World Bank. World Bank Environment Paper. Washington, D.C.: World Bank, 1992.

Dyfyniad MLA

International Union for Conservation of Nature and Natural Resources and World Bank. World Bank Environment Paper. World Bank, 1992.

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