Lua APA (7ú heag.)
Sing, R., & Sapre, S. (2010). Communication systems: Analog and digital (2nd ed.). Tata McGraw Hill Education Pvt Ltd.
Lua i Stíl Chicago (17ú heag.)
Sing, R.P, agus S.D Sapre. Communication Systems: Analog and Digital. 2nd ed. New Delhi: Tata McGraw Hill Education Pvt Ltd, 2010.
Lua MLA (9ú heag.)
Sing, R.P, agus S.D Sapre. Communication Systems: Analog and Digital. 2nd ed. Tata McGraw Hill Education Pvt Ltd, 2010.
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