Valencia, L. B. (2003). By 2005, one in four Filipinos is a mobile phone user - CLS. Manila Bulletin.
Cita Chicago (17th ed.)Valencia, Lynda B. "By 2005, One in Four Filipinos Is a Mobile Phone User - CLS." Manila Bulletin 2003.
Cita MLA (9th ed.)Valencia, Lynda B. "By 2005, One in Four Filipinos Is a Mobile Phone User - CLS." Manila Bulletin, 2003.
Atenció: Aquestes cites poden no estar 100% correctes.