APA
Lopez J. H., Serven L. j. a. & World Bank. (2006). A normal relationship". Washington, d. C: World Bank.
Chicago
Lopez J Humberto, Serven Luis jt author and World Bank. 2006. A normal relationship". Washington, d. C: World Bank.
Harvard
Lopez J. H., Serven L. j. a. and World Bank. (2006). A normal relationship". Washington, d. C: World Bank.
MLA
Lopez J Humberto, Serven Luis jt author and World Bank. A normal relationship". Washington, d. C: World Bank. 2006.