ProQuest (Firm), Frizzell, A., & Pammett, J. H. (1997). Shades of green: Environmental attitudes in Canada and around the world. Carleton University Press.
Chicago-čujuhus (17. p.)ProQuest (Firm), Alan Frizzell, juo Jon H. Pammett. Shades of Green: Environmental Attitudes in Canada and Around the World. [Ottawa, Ont.?]: Carleton University Press, 1997.
MLA-čujuhus (9. p.)ProQuest (Firm), et al. Shades of Green: Environmental Attitudes in Canada and Around the World. Carleton University Press, 1997.
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