Lim-ao, N., & Venables, A. (1999). Infrastructure, geographical disadvantage and transport costs. Trade, Development Research Group, World Bank.
Chicago-referens (17:e uppl.)Lim-ao, Nuno, och Anthony Venables. Infrastructure, Geographical Disadvantage and Transport Costs. Washington, D.C: Trade, Development Research Group, World Bank, 1999.
MLA-referens (9:e uppl.)Lim-ao, Nuno, och Anthony Venables. Infrastructure, Geographical Disadvantage and Transport Costs. Trade, Development Research Group, World Bank, 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.