Irwin, T. (2007). Government guarantees: Allocating and valuing risk in privately financed infrastructure projects. World Bank.
Lua i Stíl Chicago (17ú heag.)Irwin, Timothy. Government Guarantees: Allocating and Valuing Risk in Privately Financed Infrastructure Projects. Washington, D.C.: World Bank, 2007.
Lua MLA (9ú heag.)Irwin, Timothy. Government Guarantees: Allocating and Valuing Risk in Privately Financed Infrastructure Projects. World Bank, 2007.