Heyne, P. (2000). A student's guide to economics. ISI books.
Cita Chicago (17th ed.)Heyne, Paul. A Student's Guide to Economics. wilmington: ISI books, 2000.
Cita MLA (9th ed.)Heyne, Paul. A Student's Guide to Economics. ISI books, 2000.
Atenció: Aquestes cites poden no estar 100% correctes.