Sultan, M. M. (1975). Bench-mark survey of Kotwali and Sherpur Thana of Bogra District. Regional Academy for Rural Development.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSultan, Manzurul Mahmood. Bench-mark Survey of Kotwali and Sherpur Thana of Bogra District. Bogra: Regional Academy for Rural Development, 1975.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSultan, Manzurul Mahmood. Bench-mark Survey of Kotwali and Sherpur Thana of Bogra District. Regional Academy for Rural Development, 1975.
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