Chapman's township map of the northwest : compiled from the United States surveys and other authentic sources.

Chicago citation style
Chapman, Silas. Chapman's township map of the northwest : compiled from the United States surveys and other authentic sources.. 1857. Retrieved from the Digital Public Library of America, https://digital.library.illinois.edu/items/a02a3c00-994e-0134-2096-0050569601ca-4. (Accessed April 17, 2021.)
APA citation style
Chapman, Silas, (1857) Chapman's township map of the northwest : compiled from the United States surveys and other authentic sources.. Retrieved from the Digital Public Library of America, https://digital.library.illinois.edu/items/a02a3c00-994e-0134-2096-0050569601ca-4
MLA citation style
Chapman, Silas. Retrieved from the Digital Public Library of America <https://digital.library.illinois.edu/items/a02a3c00-994e-0134-2096-0050569601ca-4>.
Note: These citations are programmatically generated and may be incomplete.