Okidegbe, N. (1997). Fostering sustainable development: The sector investment program. World Bank.
Chicago Style aipamenaOkidegbe, Nwanze. Fostering Sustainable Development: The Sector Investment Program. Washington, D.C.: World Bank, 1997.
MLA aipamenaOkidegbe, Nwanze. Fostering Sustainable Development: The Sector Investment Program. World Bank, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.