Martin, R. M. (2000). The Lancashire giant: David Shackleton, labour leader and civil servant. Liverpool University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMartin, Ross M. The Lancashire Giant: David Shackleton, Labour Leader and Civil Servant. Liverpool: Liverpool University Press, 2000.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMartin, Ross M. The Lancashire Giant: David Shackleton, Labour Leader and Civil Servant. Liverpool University Press, 2000.
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