APA (7e ed.) Bronvermelding
Gottheil, F. M. (1996). Principles of economics. South-Western College.
Chicago (17e ed.) Bronvermelding
Gottheil, Fred M. Principles of Economics. Illinois: South-Western College, 1996.
MLA (9e ed.) Bronvermelding
Gottheil, Fred M. Principles of Economics. South-Western College, 1996.
Let op: Deze citaties zijn niet altijd 100% accuraat.