Dyfyniad APA

Clayton, A. M. H., & Radcliffe, N. J. (1996). Sustainability: A systems approach. Earthscan.

Dyfyniad Arddull Chicago

Clayton, Anthony M. H., and Nicholas J. Radcliffe. Sustainability: A Systems Approach. Boulder, Colo.: Earthscan, 1996.

Dyfyniad MLA

Clayton, Anthony M. H., and Nicholas J. Radcliffe. Sustainability: A Systems Approach. Earthscan, 1996.

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