APA (7th ed.) Citation

Jackson, C. T. (1849). Geological map of Keweenaw Point, Lake Superior. [publisher not identified].

Chicago Style (17th ed.) Citation

Jackson, Charles T. Geological Map of Keweenaw Point, Lake Superior. [United States?]: [publisher not identified], 1849.

MLA (9th ed.) Citation

Jackson, Charles T. Geological Map of Keweenaw Point, Lake Superior. [publisher not identified], 1849.

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