Dyfyniad APA
ebrary, Inc, & Sisay Asefa. (2005). The economics of sustainable development. W.E. Upjohn Institute for Employment Research.
Dyfyniad Arddull Chicago
ebrary, Inc, and Sisay Asefa. The Economics of Sustainable Development. Kalamazoo, Mich.: W.E. Upjohn Institute for Employment Research, 2005.
Dyfyniad MLA
ebrary, Inc, and Sisay Asefa. The Economics of Sustainable Development. W.E. Upjohn Institute for Employment Research, 2005.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.