Cita APA (7th ed.)
Gottheil, F. M. (1996). Principles of economics. South-Western College.
Cita Chicago (17th ed.)
Gottheil, Fred M. Principles of Economics. Illinois: South-Western College, 1996.
Cita MLA (9th ed.)
Gottheil, Fred M. Principles of Economics. South-Western College, 1996.
Atenció: Aquestes cites poden no estar 100% correctes.