Roson, R., & Small, K. A. (1998). Environment and transport in economic modelling. Kluwer Academic Publishers.
Lua i Stíl Chicago (17ú heag.)Roson, Roberto, agus Kenneth A. Small. Environment and Transport in Economic Modelling. Dordrecht, Boston: Kluwer Academic Publishers, 1998.
Lua MLA (9ú heag.)Roson, Roberto, agus Kenneth A. Small. Environment and Transport in Economic Modelling. Kluwer Academic Publishers, 1998.
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