Cita APA (7a ed.)
Krugman, P., & Wells, R. (2009). Economics (2nd ed.). Worth Publishers.
Cita Chicago Style (17a ed.)
Krugman, Paul, y Robin Wells. Economics. 2nd ed. New York: Worth Publishers, 2009.
Cita MLA (9a ed.)
Krugman, Paul, y Robin Wells. Economics. 2nd ed. Worth Publishers, 2009.
Precaución: Estas citas no son 100% exactas.