Samar, R. R. (2001). Smart makes secure Net payment with electronic cash card system. Manila Bulletin.
Chicago-viite (17. p.)Samar, Red R. "Smart Makes Secure Net Payment with Electronic Cash Card System." Manila Bulletin 2001.
MLA-viite (9. p.)Samar, Red R. "Smart Makes Secure Net Payment with Electronic Cash Card System." Manila Bulletin, 2001.
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