Kopits, E., & Cropper, M. (2003). Traffic fatalities and economic growth. Infrasturcture and Environment, Development Research Group, World Bank.
Lua i Stíl Chicago (17ú heag.)Kopits, Elizabeth, agus Maureen Cropper. Traffic Fatalities and Economic Growth. Washington, D.C: Infrasturcture and Environment, Development Research Group, World Bank, 2003.
Lua MLA (9ú heag.)Kopits, Elizabeth, agus Maureen Cropper. Traffic Fatalities and Economic Growth. Infrasturcture and Environment, Development Research Group, World Bank, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.