Uptec Computer Consultan. (2002). Information technology: Acc. to DOEACC syllabus for O level examination. Excel.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रUptec Computer Consultan. Information Technology: Acc. to DOEACC Syllabus for O Level Examination. New Delhi: Excel, 2002.
एमएलए (9वां संस्करण) प्रशस्ति पत्रUptec Computer Consultan. Information Technology: Acc. to DOEACC Syllabus for O Level Examination. Excel, 2002.
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