Hopkin, J. M. (1981). The role of an understanding of social factors in forecasting car ownership. Transport and Road Research Laboratory.
Chicago-viite (17. p.)Hopkin, Jean M. The Role of an Understanding of Social Factors in Forecasting Car Ownership. Crowthorne, Berkshire: Transport and Road Research Laboratory, 1981.
MLA-viite (9. p.)Hopkin, Jean M. The Role of an Understanding of Social Factors in Forecasting Car Ownership. Transport and Road Research Laboratory, 1981.
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