Cita APA (7a ed.)

Case, K. E., Oster, S. E., & Fair, R. C. (2017). Principles of economics (Twelfth edition.). Pearson Education Limited.

Cita Chicago Style (17a ed.)

Case, Karl E., Sharon E. Oster, y Ray C.,Seauthor Fair. Principles of Economics. Twelfth edition. Boston: Pearson Education Limited, 2017.

Cita MLA (9a ed.)

Case, Karl E., et al. Principles of Economics. Twelfth edition. Pearson Education Limited, 2017.