APA
Lopez-Calva L. F., Ortiz Juarez Eduardo & World Bank. (2011). A vulnerability approach to the definition of the middle cla. Washington DC: World Bank.
Chicago
Lopez-Calva Luis F, Ortiz Juarez Eduardo and World Bank. 2011. A vulnerability approach to the definition of the middle cla. Washington DC: World Bank.
Harvard
Lopez-Calva L. F., Ortiz Juarez Eduardo and World Bank. (2011). A vulnerability approach to the definition of the middle cla. Washington DC: World Bank.
MLA
Lopez-Calva Luis F, Ortiz Juarez Eduardo and World Bank. A vulnerability approach to the definition of the middle cla. Washington DC: World Bank. 2011.