APA (7th ed.) Citation

United States. Army Map Service. (1944). Greenland 1: 500,000 (2d ed.). [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Army Map Service. Greenland 1: 500,000. 2d ed. Washington: [publisher not identified], 1944.

MLA (9th ed.) Citation

United States. Army Map Service. Greenland 1: 500,000. 2d ed. [publisher not identified], 1944.

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