The World Bank. (2002). Operation evaluation department (OED): First 30 years. Washington, D.C: The World Bank.
استشهاد بنمط شيكاغوThe World Bank. Operation Evaluation Department (OED): First 30 Years. Washington, D.C: The World Bank, 2002.
MLA استشهادThe World Bank. Operation Evaluation Department (OED): First 30 Years. Washington, D.C: The World Bank, 2002.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.