Singh, A. K., Tiwari, M., & Prakash, A. (2006). Digital principles switching theory. New Age International (P) Ltd., Publishers.
Lua i Stíl Chicago (17ú heag.)Singh, A. K., Manish Tiwari, agus Arun Prakash. Digital Principles Switching Theory. New Delhi: New Age International (P) Ltd., Publishers, 2006.
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