Hartley, K. (1997). Double Bass Solo: Bd.1 / selected and adapted by Keith Hartley. Oxford Univ. Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHartley, Keith. Double Bass Solo: Bd.1 / Selected and Adapted by Keith Hartley. Oxford [u.a.]: Oxford Univ. Press, 1997.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHartley, Keith. Double Bass Solo: Bd.1 / Selected and Adapted by Keith Hartley. Oxford Univ. Press, 1997.
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