Ultra, J. D. (2013). A collaborative access control model for e-voting systems. College of Engineering, University of the Philippines Diliman.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUltra, John D. A Collaborative Access Control Model for E-voting Systems. Quezon City: College of Engineering, University of the Philippines Diliman, 2013.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUltra, John D. A Collaborative Access Control Model for E-voting Systems. College of Engineering, University of the Philippines Diliman, 2013.
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