Helweg, A. W. (1979). Sikhs in England: The development of a migrant community. Oxford University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHelweg, Arthur Wesley. Sikhs in England: The Development of a Migrant Community. Oxford University Press, 1979.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHelweg, Arthur Wesley. Sikhs in England: The Development of a Migrant Community. Oxford University Press, 1979.
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