Dyfyniad APA

University of Massachusetts at Amherst. Natural Assets Project., Boyce, J. K., & Shelley, B. G. (2003). Natural assets: Democratizing environmental ownership. Washington, DC: Island Press.

Dyfyniad Arddull Chicago

University of Massachusetts at Amherst. Natural Assets Project., James K. Boyce, và Barry G. Shelley. Natural Assets: Democratizing Environmental Ownership. Washington, DC: Island Press, 2003.

Dyfyniad MLA

University of Massachusetts at Amherst. Natural Assets Project., James K. Boyce, và Barry G. Shelley. Natural Assets: Democratizing Environmental Ownership. Washington, DC: Island Press, 2003.

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