APA
World Bank, . (1986). The World Bank research observer. Washington, D. C: World Bank.
Chicago
World Bank, . 1986. The World Bank research observer. Washington, D. C: World Bank.
Harvard
World Bank, . (1986). The World Bank research observer. Washington, D. C: World Bank.
MLA
World Bank, . The World Bank research observer. Washington, D. C: World Bank. 1986.