Dyfyniad APA
ebrary, Inc, Frizzell, A., & Pammett, J. H. (1997). Shades of green: Environmental attitudes in Canada and around the world. Carleton University Press.
Dyfyniad Arddull Chicago
ebrary, Inc, Alan Frizzell, and Jon H. Pammett. Shades of Green: Environmental Attitudes in Canada and Around the World. [Ottawa, Ont.?]: Carleton University Press, 1997.
Dyfyniad MLA
ebrary, Inc, et al. Shades of Green: Environmental Attitudes in Canada and Around the World. Carleton University Press, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.