APA (7th ed.) Zitazioa
Gottheil, F. M. (1996). Principles of economics (ed.). South Western College Publishing.
Chicago Style (17th ed.) Zitazioa
Gottheil, Fred M. Principles of Economics. ed. Ohio: South Western College Publishing, 1996.
MLA (9th ed.) Zitazioa
Gottheil, Fred M. Principles of Economics. ed. South Western College Publishing, 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.