Cita APA (7th ed.)

Case, K. (2002). Principles of economics (6th.). Pearson Education.

Cita Chicago (17th ed.)

Case, Karl. Principles of Economics. 6th. Delhi: Pearson Education, 2002.

Cita MLA (9th ed.)

Case, Karl. Principles of Economics. 6th. Pearson Education, 2002.