APA (7th ed.) Citation

Great Britain. War Office. General Staff. Geographical Section. (1941). Egypt 1: 500,000 (1st-2nd eds.). G.S.G.S..

Chicago Style (17th ed.) Citation

Great Britain. War Office. General Staff. Geographical Section. Egypt 1: 500,000. 1st-2nd eds. [London]: G.S.G.S., 1941.

MLA (9th ed.) Citation

Great Britain. War Office. General Staff. Geographical Section. Egypt 1: 500,000. 1st-2nd eds. G.S.G.S., 1941.