Subrahmanyam, N., & Lal, B. (1974). A textbook of sound: For B.Sc.(Pass Honours and Subsidiary),Engineering sutdunts of Indian University and IAS Examination. G. Bell and sons Ltd. ; Vikas publishing House.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSubrahmanyam, N., और Brij Lal. A Textbook of Sound: For B.Sc.(Pass Honours and Subsidiary),Engineering Sutdunts of Indian University and IAS Examination. London : New Delhi: G. Bell and sons Ltd. ; Vikas publishing House, 1974.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSubrahmanyam, N., और Brij Lal. A Textbook of Sound: For B.Sc.(Pass Honours and Subsidiary),Engineering Sutdunts of Indian University and IAS Examination. G. Bell and sons Ltd. ; Vikas publishing House, 1974.
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