APA (7th ed.) Zitazioa
Webb, G. (1956). Architecture in Britain: The middle ages. Penguin books.
Chicago Style (17th ed.) Zitazioa
Webb, Geoffrey. Architecture in Britain: The Middle Ages. Harmondsworth, Middlesex [u.a.]: Penguin books, 1956.
MLA (9th ed.) Zitazioa
Webb, Geoffrey. Architecture in Britain: The Middle Ages. Penguin books, 1956.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.