APA (7th ed.) Zitazioa

Barber, M. (2003). the two cities: Medieval europe 1050-1320 (Second edition.). Routledge.

Chicago Style (17th ed.) Zitazioa

Barber, Malcolm. The Two Cities: Medieval Europe 1050-1320. Second edition. London: Routledge, 2003.

MLA (9th ed.) Zitazioa

Barber, Malcolm. The Two Cities: Medieval Europe 1050-1320. Second edition. Routledge, 2003.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.