Hornby, A. A guide to patterns and usafge in english. O.U.P.
Cita Chicago (17th ed.)Hornby, A. A Guide to Patterns and Usafge in English. London: O.U.P.
Cita MLA (9th ed.)Hornby, A. A Guide to Patterns and Usafge in English. O.U.P.
Atenció: Aquestes cites poden no estar 100% correctes.