Kopits, E., & Cropper, M. (2005). Why have traffic fatalities declined in industrialized countries?: Implications for pedestrians and vehicle occupants. World Bank.
Chicago-viite (17. p.)Kopits, Elizabeth, ja Maureen Cropper. Why Have Traffic Fatalities Declined in Industrialized Countries?: Implications for Pedestrians and Vehicle Occupants. Washington, D.C: World Bank, 2005.
MLA-viite (8. p.)Kopits, Elizabeth, ja Maureen Cropper. Why Have Traffic Fatalities Declined in Industrialized Countries?: Implications for Pedestrians and Vehicle Occupants. World Bank, 2005.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.