Gwilliam, K. M., & Bofinger, H. (2011). Africa's transport infrastructure: Mainstreaming maintenance and management. World Bank.
Citazione stile Chigago Style (17a edizione)Gwilliam, K. M., e Heinrich Bofinger. Africa's Transport Infrastructure: Mainstreaming Maintenance and Management. Washington, D.C.: World Bank, 2011.
Citatione MLA (9a ed.)Gwilliam, K. M., e Heinrich Bofinger. Africa's Transport Infrastructure: Mainstreaming Maintenance and Management. World Bank, 2011.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.