Dyfyniad APA
ebrary, Inc, & Liu, J. (2011). Sources, sinks and sustainability. Cambridge University Press.
Dyfyniad Arddull Chicago
ebrary, Inc, and Jianguo Liu. Sources, Sinks and Sustainability. Cambridge ; New York: Cambridge University Press, 2011.
Dyfyniad MLA
ebrary, Inc, and Jianguo Liu. Sources, Sinks and Sustainability. Cambridge University Press, 2011.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.