Cita APA (7a ed.)
Walton, G. M., & Wykoff, F. C. (1991). Understanding economics today (3rd ed.). IRWIN.
Cita Chicago Style (17a ed.)
Walton, Gary M., y Frank C. Wykoff. Understanding Economics Today. 3rd ed. Illinois: IRWIN, 1991.
Cita MLA (9a ed.)
Walton, Gary M., y Frank C. Wykoff. Understanding Economics Today. 3rd ed. IRWIN, 1991.
Precaución: Estas citas no son 100% exactas.