Cita APA (7th ed.)

Case, K. E., Fair, R. C., & Oster, S. M. (2012). Principles of economics (10th ed.). Prentice Hall.

Cita Chicago (17th ed.)

Case, Karl E., Ray C. Fair, i Sharon M. Oster. Principles of Economics. 10th ed. Boston: Prentice Hall, 2012.

Cita MLA (9th ed.)

Case, Karl E., et al. Principles of Economics. 10th ed. Prentice Hall, 2012.