(2002). PLDT phone cards seen to grow by 10% this year. Manila Times.
Chicago-referens (17:e uppl.)"PLDT Phone Cards Seen to Grow by 10% This Year." Manila Times 2002.
MLA-referens (9:e uppl.)"PLDT Phone Cards Seen to Grow by 10% This Year." Manila Times, 2002.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.