Cita APA (7th ed.)

Haveman, R. H., & Knopf, K. A. (1978). The market system: An introduction to microeconomics (3rd ed.). Wiley.

Cita Chicago (17th ed.)

Haveman, Robert H., i Kenyon A. Knopf. The Market System: An Introduction to Microeconomics. 3rd ed. Santa Barbara, [Calif.]: Wiley, 1978.

Cita MLA (9th ed.)

Haveman, Robert H., i Kenyon A. Knopf. The Market System: An Introduction to Microeconomics. 3rd ed. Wiley, 1978.