Cita APA (7th ed.)

McCONNEL, C. R., & BRUCE, S. L. (1990). Economics; principles, problem,and policies.-- Ed.11. McGraw-Hill.

Cita Chicago (17th ed.)

McCONNEL, Campbell R., i Stanley L. BRUCE. Economics; Principles, Problem,and Policies.-- Ed.11. New York: McGraw-Hill, 1990.

Cita MLA (9th ed.)

McCONNEL, Campbell R., i Stanley L. BRUCE. Economics; Principles, Problem,and Policies.-- Ed.11. McGraw-Hill, 1990.