Cita APA (7a ed.)

Koivisto, W. A. (1957). Principles and problems of modern economics. Wiley.

Cita Chicago Style (17a ed.)

Koivisto, William A. Principles and Problems of Modern Economics. N.Y.: Wiley, 1957.

Cita MLA (8a ed.)

Koivisto, William A. Principles and Problems of Modern Economics. Wiley, 1957.