Ubel PA. (2009). Free market Madness. Harvard Bus. School Pub.
Cita Chicago (17th ed.)Ubel PA. Free Market Madness. Boston: Harvard Bus. School Pub, 2009.
Cita MLA (9th ed.)Ubel PA. Free Market Madness. Harvard Bus. School Pub, 2009.
Atenció: Aquestes cites poden no estar 100% correctes.