Cita APA (7a ed.)

McConnell, C. R. (1981). Economics: Principles, problems and policies (8th ed.). McGraw-Hill Book Company.

Cita Chicago Style (17a ed.)

McConnell, Campbell R. Economics: Principles, Problems and Policies. 8th ed. New York [etc.]: McGraw-Hill Book Company, 1981.

Cita MLA (9a ed.)

McConnell, Campbell R. Economics: Principles, Problems and Policies. 8th ed. McGraw-Hill Book Company, 1981.