APA (7th ed.) Citation

McConnell, C. R. (1975). Economics: Principles, problems, and policies (6th ed.). McGraw-Hill.

Chicago Style (17th ed.) Citation

McConnell, Campbell R. Economics: Principles, Problems, and Policies. 6th ed. New York [etc.]: McGraw-Hill, 1975.

MLA (9th ed.) Citation

McConnell, Campbell R. Economics: Principles, Problems, and Policies. 6th ed. McGraw-Hill, 1975.