Kalakota, R. (1999). Frontiers of electronic commerce (2nd.). Addison Wesley.
Chicago-čujuhus (17. p.)Kalakota, Ravi. Frontiers of Electronic Commerce. 2nd. Massachuse tts: Addison Wesley, 1999.
MLA-čujuhus (9. p.)Kalakota, Ravi. Frontiers of Electronic Commerce. 2nd. Addison Wesley, 1999.
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