Samar, R. R. (2001). Smart makes secure Net payment with electronic cash card system. Manila Bulletin.
Chicago Style aipamenaSamar, Red R. "Smart Makes Secure Net Payment with Electronic Cash Card System." Manila Bulletin 2001.
MLA aipamenaSamar, Red R. "Smart Makes Secure Net Payment with Electronic Cash Card System." Manila Bulletin, 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.