(2002). PLDT phone cards seen to grow by 10% this year. Manila Times.
Chicago Style aipamena"PLDT Phone Cards Seen to Grow by 10% This Year." Manila Times 2002.
MLA aipamena"PLDT Phone Cards Seen to Grow by 10% This Year." Manila Times, 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.