Hartwick John M & Olewiler, N. D. (1986). The economics of natural resource use. Harper and Row.
Chicago-čujuhus (17. p.)Hartwick John M juo Nancy D. Olewiler. The Economics of Natural Resource Use. New York: Harper and Row, 1986.
MLA-čujuhus (9. p.)Hartwick John M juo Nancy D. Olewiler. The Economics of Natural Resource Use. Harper and Row, 1986.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.