APA (7th ed.) Citation

United States. Army Map Service. (1957). Greenland 1: 250,000. The Service.

Chicago Style (17th ed.) Citation

United States. Army Map Service. Greenland 1: 250,000. Washington: The Service, 1957.

MLA (8th ed.) Citation

United States. Army Map Service. Greenland 1: 250,000. The Service, 1957.

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