APA (7e ed.) Bronvermelding

O'Sullivan, A., & Sheffrin, S. M. (2006). Economics: Principles and tools (4th ed.). Pearson/ Prentice Hall.

Chicago (17e ed.) Bronvermelding

O'Sullivan, Arthur, en Steven M. Sheffrin. Economics: Principles and Tools. 4th ed. Upper Saddle River, NJ: Pearson/ Prentice Hall, 2006.

MLA (8e ed.) Bronvermelding

O'Sullivan, Arthur, en Steven M. Sheffrin. Economics: Principles and Tools. 4th ed. Pearson/ Prentice Hall, 2006.