Pearson, J. (2015). The profession of violence: The rise and fall of the Kray twins (Fifth edition.). William Collins.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPearson, John. The Profession of Violence: The Rise and Fall of the Kray Twins. Fifth edition. London: William Collins, 2015.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPearson, John. The Profession of Violence: The Rise and Fall of the Kray Twins. Fifth edition. William Collins, 2015.
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