APA (7th ed.) Zitazioa
Mceachern, W. A. (1988). Economics: A contemporary introduction. South-Western.
Chicago Style (17th ed.) Zitazioa
Mceachern, William A. Economics: A Contemporary Introduction. Cincinnati: South-Western, 1988.
MLA (9th ed.) Zitazioa
Mceachern, William A. Economics: A Contemporary Introduction. South-Western, 1988.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.