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Lua i Stíl Chicago (17ú heag.)Carballo, Bibsy M. "Reactions to Proposed 10 Percent Additional Witholding Tax on the Entertainment Sector." Philippine Daily Inquirer 2001.
Lua MLA (9ú heag.)Carballo, Bibsy M. "Reactions to Proposed 10 Percent Additional Witholding Tax on the Entertainment Sector." Philippine Daily Inquirer, 2001.
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