Dyfyniad APA

United Nations. Development Programme, World Resources Institute, United Nations Environment Programme, & World Bank. (2000). World resources: 2000/2001. World Resources Institute.

Dyfyniad Arddull Chicago

United Nations. Development Programme, World Resources Institute, United Nations Environment Programme, and World Bank. World Resources: 2000/2001. Washington, D.C.: World Resources Institute, 2000.

Dyfyniad MLA

United Nations. Development Programme, et al. World Resources: 2000/2001. World Resources Institute, 2000.

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