Ramos, D. E. (1997). Smart ups plan zero rate by P1 per minute. Manila Times.
Chicago-viite (17. p.)Ramos, Deogracias E. "Smart Ups Plan Zero Rate by P1 Per Minute." Manila Times 1997.
MLA-viite (9. p.)Ramos, Deogracias E. "Smart Ups Plan Zero Rate by P1 Per Minute." Manila Times, 1997.
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