British Standards Institution. (1979). Methods for specifying and measuring the characteristics of sound system equipment. British Standards Institution.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBritish Standards Institution. Methods for Specifying and Measuring the Characteristics of Sound System Equipment. London: British Standards Institution, 1979.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBritish Standards Institution. Methods for Specifying and Measuring the Characteristics of Sound System Equipment. British Standards Institution, 1979.
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