Cita APA (7a ed.)

Gottheil, F. M. (1996). Principles of economics. South-Western.

Cita Chicago Style (17a ed.)

Gottheil, Fred M. Principles of Economics. Cincinnati: South-Western, 1996.

Cita MLA (9a ed.)

Gottheil, Fred M. Principles of Economics. South-Western, 1996.