Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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