O'Mahony, D., Peirce, M., & Tewari, H. (2001). Electronic payment systems for e-commerce (2nd ed.). Artech House.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रO'Mahony, Donal, Michael Peirce, और Hitesh Tewari. Electronic Payment Systems for E-commerce. 2nd ed. Boston: Artech House, 2001.
एमएलए (8वां संस्करण) प्रशस्ति पत्रO'Mahony, Donal, et al. Electronic Payment Systems for E-commerce. 2nd ed. Artech House, 2001.
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