Ellen, R. (1982). Environment, subsistence, and system: The ecology of small-scale social formations. Cambridge University Press.
Chicago-čujuhus (17. p.)Ellen, Roy. Environment, Subsistence, and System: The Ecology of Small-scale Social Formations. [Cambridge [Cambridgeshire ; New York: Cambridge University Press, 1982.
MLA-čujuhus (9. p.)Ellen, Roy. Environment, Subsistence, and System: The Ecology of Small-scale Social Formations. Cambridge University Press, 1982.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.