Style de citation APA (7e éd.)

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

Style de citation Chicago (17e éd.)

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

Style de citation MLA (9e éd.)

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