Ali, S. R. (1998). Digital switching systems: System reliability and analysis. Tata McGraw-Hill ; McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAli, Syed Riffat. Digital Switching Systems: System Reliability and Analysis. New Delhi : New York: Tata McGraw-Hill ; McGraw-Hill, 1998.
एमएलए (8वां संस्करण) प्रशस्ति पत्रAli, Syed Riffat. Digital Switching Systems: System Reliability and Analysis. Tata McGraw-Hill ; McGraw-Hill, 1998.
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