Cita APA (7th ed.)

Case, K. E., Fair, R. C., & Oster, S. M. (2020). Principles of economics (Thirteenth edition.). Pearson.

Cita Chicago (17th ed.)

Case, Karl E., Ray C. Fair, i Sharon M. Oster. Principles of Economics. Thirteenth edition. Harlow, UK: Pearson, 2020.

Cita MLA (9th ed.)

Case, Karl E., et al. Principles of Economics. Thirteenth edition. Pearson, 2020.