Howell, J. B. (1983). Style Manuals of the English-Speaking World: A Guide. Oryx Press.
Lua i Stíl Chicago (17ú heag.)Howell, John Bruce. Style Manuals of the English-Speaking World: A Guide. Phoenix: Oryx Press, 1983.
Lua MLA (9ú heag.)Howell, John Bruce. Style Manuals of the English-Speaking World: A Guide. Oryx Press, 1983.
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