HILL, L. (1985). A guide to correct english.-- ed.2. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)HILL, L.A. A Guide to Correct English.-- Ed.2. Singapore: Oxford University Press, 1985.
Lua MLA (9ú heag.)HILL, L.A. A Guide to Correct English.-- Ed.2. Oxford University Press, 1985.
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