APA (7e ed.) Bronvermelding

Case, K. E., Fair, R. C., & Oster, S. E. (2018). Principles of Economics (12th ed.). Pearson education India Pvt. Ltd.

Chicago (17e ed.) Bronvermelding

Case, Karl E., Ray C. Fair, en Sharon E. Oster. Principles of Economics. 12th ed. New Delhi: Pearson education India Pvt. Ltd, 2018.

MLA (9e ed.) Bronvermelding

Case, Karl E., et al. Principles of Economics. 12th ed. Pearson education India Pvt. Ltd, 2018.