Viswanathan, T. &. B. (2020). Telecommunication Switching Systems and Networks (02nd Edition.). PHI Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रViswanathan, Thiagarajan & Bhatnagar. Telecommunication Switching Systems and Networks. 02nd Edition. New Delhi: PHI Publications, 2020.
एमएलए (9वां संस्करण) प्रशस्ति पत्रViswanathan, Thiagarajan & Bhatnagar. Telecommunication Switching Systems and Networks. 02nd Edition. PHI Publications, 2020.
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