Keen, W. J. (1928). The North West Frontier Province and the war. Govt. Print. and Stationery.
Lua i Stíl Chicago (17ú heag.)Keen, W. J. The North West Frontier Province and the War. Peshawar: Govt. Print. and Stationery, 1928.
Lua MLA (8ú heag.)Keen, W. J. The North West Frontier Province and the War. Govt. Print. and Stationery, 1928.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.