APA
World Bank, . (2006). Doing business in 2006. Washington, D. C: World Bank.
Chicago
World Bank, . 2006. Doing business in 2006. Washington, D. C: World Bank.
Harvard
World Bank, . (2006). Doing business in 2006. Washington, D. C: World Bank.
MLA
World Bank, . Doing business in 2006. Washington, D. C: World Bank. 2006.