Keen, W. J. (1928). The North West Frontier Province and the war. Govt. Print. and Stationery.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKeen, W. J. The North West Frontier Province and the War. Peshawar: Govt. Print. and Stationery, 1928.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKeen, W. J. The North West Frontier Province and the War. Govt. Print. and Stationery, 1928.
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