Παραπομπή σε μορφή APA (7η εκδ.)

Kingdom, B., Liemberger, R., & Marin, P. (2006). The challenge of reducing non-revenue water (NRW) in developing countries:how the private sector can help: A look at performance-based service contracting. World Bank.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Kingdom, Bill, Roland Liemberger, και Philippe Marin. The Challenge of Reducing Non-revenue Water (NRW) in Developing Countries:how the Private Sector Can Help: A Look at Performance-based Service Contracting. Washington, D.C: World Bank, 2006.

Παραπομπή σε μορφή MLA (9th εκδ.)

Kingdom, Bill, et al. The Challenge of Reducing Non-revenue Water (NRW) in Developing Countries:how the Private Sector Can Help: A Look at Performance-based Service Contracting. World Bank, 2006.