APA (7e ed.) Bronvermelding

Keen, W. J. (1928). The North West Frontier Province and the war. Govt. Print. and Stationery.

Chicago (17e ed.) Bronvermelding

Keen, W. J. The North West Frontier Province and the War. Peshawar: Govt. Print. and Stationery, 1928.

MLA (8e ed.) Bronvermelding

Keen, W. J. The North West Frontier Province and the War. Govt. Print. and Stationery, 1928.