APA (7th ed.) Citation

Geological Survey. (1912). Map of North America: Reduced from map on scale of 1:5,000,000. Engraved and printed by the U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geological Survey. Map of North America: Reduced from Map on Scale of 1:5,000,000. [Washington, D.C.]: Engraved and printed by the U.S. Geological Survey, 1912.

MLA (8th ed.) Citation

Geological Survey. Map of North America: Reduced from Map on Scale of 1:5,000,000. Engraved and printed by the U.S. Geological Survey, 1912.