Tohutoro APA (7th ed.)
Viswanathan, T. (1992). Telecommunication switching systems and networks. Prentice Hall of India.
Tohutoru Kātū Chicago (17th ed.)
Viswanathan, Thiagarajan. Telecommunication Switching Systems and Networks. New Delhi: Prentice Hall of India, 1992.
Tohutoro MLA (9th ed.)
Viswanathan, Thiagarajan. Telecommunication Switching Systems and Networks. Prentice Hall of India, 1992.
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