APA (7th ed.) Citation

United States. Army Map Service. (1943). Outline map-- 1: 19,000,000 (approximate) .. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Army Map Service. Outline Map-- 1: 19,000,000 (approximate) .. Washington: [publisher not identified], 1943.

MLA (9th ed.) Citation

United States. Army Map Service. Outline Map-- 1: 19,000,000 (approximate) .. [publisher not identified], 1943.

Warning: These citations may not always be 100% accurate.