Cita APA (7a ed.)
Krugman, P., Wells, R., & Graddy, K. (2008). Economics (european edition.). Worth Publishers.
Cita Chicago Style (17a ed.)
Krugman, Paul, Robin Wells, y Kathryn Graddy. Economics. european edition. New York: Worth Publishers, 2008.
Cita MLA (9a ed.)
Krugman, Paul, et al. Economics. european edition. Worth Publishers, 2008.
Precaución: Estas citas no son 100% exactas.