MCCONNELL, C. R., BRUE, S. L., & FLYNN, S. M. (2012). Economics: Principles, problem and policies. McGraw-Hill Book Company.

MCCONNELL, Campbell R., Stanley L. BRUE, and Sean M. FLYNN. Economics: Principles, Problem and Policies. McGraw-Hill Book Company, 2012.

MCCONNELL, Campbell R., et al. Economics: Principles, Problem and Policies. McGraw-Hill Book Company, 2012.