APA (7th ed.) Citation

Hitchcock, C. H., & Blake, W. P. (1872). Geological map of the United States. Government Printing Office].

Chicago Style (17th ed.) Citation

Hitchcock, Charles H., and William P. Blake. Geological Map of the United States. [Washington, D.C.: Government Printing Office], 1872.

MLA (8th ed.) Citation

Hitchcock, Charles H., and William P. Blake. Geological Map of the United States. Government Printing Office], 1872.