Schiller, B. R. (1989). The economy today (4th ed.). Random House.
Cita Chicago (17th ed.)Schiller, Bradley R. The Economy Today. 4th ed. New York: Random House, 1989.
Cita MLA (9th ed.)Schiller, Bradley R. The Economy Today. 4th ed. Random House, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.