Hornby, A. A guide to patterns and usafge in english. O.U.P.
Lua i Stíl Chicago (17ú heag.)Hornby, A. A Guide to Patterns and Usafge in English. London: O.U.P.
Lua MLA (9ú heag.)Hornby, A. A Guide to Patterns and Usafge in English. O.U.P.
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