APA
World Bank. International Bank for Reconstruction and Development and International Development Association (Washington), . (1981). Annual report 1981. Washington, D C: World Bank.
Chicago
World Bank. International Bank for Reconstruction and Development and International Development Association (Washington), . 1981. Annual report 1981. Washington, D C: World Bank.
Harvard
World Bank. International Bank for Reconstruction and Development and International Development Association (Washington), . (1981). Annual report 1981. Washington, D C: World Bank.
MLA
World Bank. International Bank for Reconstruction and Development and International Development Association (Washington), . Annual report 1981. Washington, D C: World Bank. 1981.