Amin, S. (2008). Are you being served?: New tools for measuring service delivery. The World Bank.
Chicago Style aipamenaAmin, Samia. Are You Being Served?: New Tools for Measuring Service Delivery. Washington, D.C: The World Bank, 2008.
MLA aipamenaAmin, Samia. Are You Being Served?: New Tools for Measuring Service Delivery. The World Bank, 2008.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.