Cita APA (7a ed.)

Hasek, C. W. Principles of economics / by C. W. Hasek, PH. D. professor of economics Pensylvania State College.

Cita Chicago Style (17a ed.)

Hasek, Carl William. Principles of Economics / by C. W. Hasek, PH. D. Professor of Economics Pensylvania State College. New York : Prentice-Hall, inc., 1939.

Cita MLA (8a ed.)

Hasek, Carl William. Principles of Economics / by C. W. Hasek, PH. D. Professor of Economics Pensylvania State College.