Cita APA (7a ed.)

Case, K. E. (1994). Principles of economics (3th ed.). Prentice hall.

Cita Chicago Style (17a ed.)

Case, Karl E. Principles of Economics. 3th ed. New York [etc.]: Prentice hall, 1994.

Cita MLA (9a ed.)

Case, Karl E. Principles of Economics. 3th ed. Prentice hall, 1994.