Gwilliam, K. M., & Bofinger, H. (2011). Africa's transport infrastructure: Mainstreaming maintenance and management. World Bank.
Lua i Stíl Chicago (17ú heag.)Gwilliam, K. M., agus Heinrich Bofinger. Africa's Transport Infrastructure: Mainstreaming Maintenance and Management. Washington, D.C.: World Bank, 2011.
Lua MLA (9ú heag.)Gwilliam, K. M., agus Heinrich Bofinger. Africa's Transport Infrastructure: Mainstreaming Maintenance and Management. World Bank, 2011.
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