APA (7th ed.) Zitazioa
Harvey, J. (1991). Intermediate economics (5th ed.). MacMillan.
Chicago Style (17th ed.) Zitazioa
Harvey, Jack. Intermediate Economics. 5th ed. London: MacMillan, 1991.
MLA (9th ed.) Zitazioa
Harvey, Jack. Intermediate Economics. 5th ed. MacMillan, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.