McConnell, C. R. (1987). Economics: Principles, problems, and policies (10ª ed.). Mc Graw Hill.
Cita Chicago (17th ed.)McConnell, Campbell R. Economics: Principles, Problems, and Policies. 10ª ed. Mc Graw Hill, 1987.
Cita MLA (9th ed.)McConnell, Campbell R. Economics: Principles, Problems, and Policies. 10ª ed. Mc Graw Hill, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.