Cita APA

Ingram, G. K., & Zhi, L. (1998). Vehicles, roads, and road use: Alternative empirical specifications. Washington: World Bank.

Citación estilo Chicago

Ingram, Gregory K., and Liu Zhi. Vehicles, Roads, and Road Use: Alternative Empirical Specifications. Washington: World Bank, 1998.

Cita MLA

Ingram, Gregory K., and Liu Zhi. Vehicles, Roads, and Road Use: Alternative Empirical Specifications. Washington: World Bank, 1998.