Dyfyniad APA
(1995). Defining and measuring sustainability: The biogeophysical foundations. The World Bank.
Dyfyniad Arddull Chicago
Defining and Measuring Sustainability: The Biogeophysical Foundations. Washington: The World Bank, 1995.
Dyfyniad MLA
Defining and Measuring Sustainability: The Biogeophysical Foundations. The World Bank, 1995.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.