Tohutoro APA (7th ed.)
Ali, S. R. (2002). Digital switching systems. Tata McGraw-Hill.
Tohutoru Kātū Chicago (17th ed.)
Ali, Syed Riffat. Digital Switching Systems. New Delhi: Tata McGraw-Hill, 2002.
Tohutoro MLA (9th ed.)
Ali, Syed Riffat. Digital Switching Systems. Tata McGraw-Hill, 2002.
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