Hornby, A. A guide to patterns and usafge in english. O.U.P.
Chicago Style aipamenaHornby, A. A Guide to Patterns and Usafge in English. London: O.U.P.
MLA aipamenaHornby, A. A Guide to Patterns and Usafge in English. O.U.P.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.