APA (7th ed.) Citation

Great Britain. War Office. General Staff. Geographical Section & Great Britain. Ordnance Survey. (1916). German East Africa. Ordnance Survey.

Chicago Style (17th ed.) Citation

Great Britain. War Office. General Staff. Geographical Section and Great Britain. Ordnance Survey. German East Africa. [Southampton?]: Ordnance Survey, 1916.

MLA (8th ed.) Citation

Great Britain. War Office. General Staff. Geographical Section and Great Britain. Ordnance Survey. German East Africa. Ordnance Survey, 1916.