Citazione Stile APA (7a Edizione)

Ingram, G. K., & Liu, Z. (1999). Determinants of motorization and road provision. Transport Division, Research Advisory Staff and Transport, Water and Urban Development Department, World Bank.

Citazione stile Chigago Style (17a edizione)

Ingram, Gregory K., e Zhi Liu. Determinants of Motorization and Road Provision. Washington, D.C: Transport Division, Research Advisory Staff and Transport, Water and Urban Development Department, World Bank, 1999.

Citatione MLA (9a ed.)

Ingram, Gregory K., e Zhi Liu. Determinants of Motorization and Road Provision. Transport Division, Research Advisory Staff and Transport, Water and Urban Development Department, World Bank, 1999.