Sen, S. (1977). Working class of India: History of emergence and movement, 1830-1970. K.P. Bagchi.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSen, Sukomal. Working Class of India: History of Emergence and Movement, 1830-1970. K.P. Bagchi, 1977.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSen, Sukomal. Working Class of India: History of Emergence and Movement, 1830-1970. K.P. Bagchi, 1977.
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