Cita APA (7th ed.)
McConnell, C. R. (1987). Economics: Principles, problems, and policies (10th ed.). McGraw-Hill.
Cita Chicago (17th ed.)
McConnell, Campbell R. Economics: Principles, Problems, and Policies. 10th ed. New York: McGraw-Hill, 1987.
Cita MLA (9th ed.)
McConnell, Campbell R. Economics: Principles, Problems, and Policies. 10th ed. McGraw-Hill, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.