(2001). Contracting for public services: Output-based aid and its applications. Washington DC: World Bank.
Trích dẫn kiểu ChicagoContracting for Public Services: Output-based Aid and Its Applications. Washington DC: World Bank, 2001.
Trích dẫn MLAContracting for Public Services: Output-based Aid and Its Applications. Washington DC: World Bank, 2001.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.