Gaya APA

McConnell, C, R., Brue, S, L. (1993). Economics : principles, problems, and policies (12th.ed.). New York: McGraw-Hill, Inc..

Gaya MLA

McConnell, Campbell, R., Brue, Stanley, L.. "Economics : principles, problems, and policies". 12th.ed. New York: McGraw-Hill, Inc., 1993. Text.