HALSALL FRED. (2008). MULTIMEDIA COMMUNICATIONS. PEARSON PUBLICATION.
Lua i Stíl Chicago (17ú heag.)HALSALL FRED. MULTIMEDIA COMMUNICATIONS. NEW DELHI: PEARSON PUBLICATION, 2008.
Lua MLA (9ú heag.)HALSALL FRED. MULTIMEDIA COMMUNICATIONS. PEARSON PUBLICATION, 2008.
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