Organisation for Economic Co-Operation and Development & Organisation for Economic Co-Operation and Development. (1998). User charging for government services: Best practice guidelines and case studies. Organisation for economic co-operation and development.
Παραπομπή σε μορφή Chicago (17η εκδ.)Organisation for Economic Co-Operation and Development και Organisation for Economic Co-Operation and Development. User Charging for Government Services: Best Practice Guidelines and Case Studies. [χ.τ.]: Organisation for economic co-operation and development, 1998.
Παραπομπή σε μορφή MLA (8th εκδ.)Organisation for Economic Co-Operation and Development και Organisation for Economic Co-Operation and Development. User Charging for Government Services: Best Practice Guidelines and Case Studies. Organisation for economic co-operation and development, 1998.
