McCONNELL, C. R., & BRUE, S. L. (1990). Microeconomics: Principles, problems, and policies. McGraw-Hill.

McCONNELL, Campbell R., and Stanley L. BRUE. Microeconomics: Principles, Problems, and Policies. New York: McGraw-Hill, 1990.

McCONNELL, Campbell R., and Stanley L. BRUE. Microeconomics: Principles, Problems, and Policies. McGraw-Hill, 1990.