Casanova, S. (2002). New prepaid card disables cell phones' voice feature. Manila Times.
Chicago-referens (17:e uppl.)Casanova, Sheryll. "New Prepaid Card Disables Cell Phones' Voice Feature." Manila Times 2002.
MLA-referens (9:e uppl.)Casanova, Sheryll. "New Prepaid Card Disables Cell Phones' Voice Feature." Manila Times, 2002.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.