Lewis, W. A. (1970). Summary: The causes of unemployment in less developed countries and some research topics. International Labour Organization.
Citazione stile Chigago Style (17a edizione)Lewis, W. Arthur. Summary: The Causes of Unemployment in Less Developed Countries and Some Research Topics. International Labour Organization, 1970.
Citatione MLA (9a ed.)Lewis, W. Arthur. Summary: The Causes of Unemployment in Less Developed Countries and Some Research Topics. International Labour Organization, 1970.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.