APA (7th ed.) Citation

Foster, J. W., Whitney, J. D., Hill, S. W., Schlatter, W., & Jackson, C. T. (1849). Geological map of Keweenaw Point, Lake Superior, Michigan. P.S. Duval's Steam Press.

Chicago Style (17th ed.) Citation

Foster, J. W., J. D. Whitney, S. W. Hill, Wm Schlatter, and Charles T. Jackson. Geological Map of Keweenaw Point, Lake Superior, Michigan. Philadelphia: P.S. Duval's Steam Press, 1849.

MLA (9th ed.) Citation

Foster, J. W., et al. Geological Map of Keweenaw Point, Lake Superior, Michigan. P.S. Duval's Steam Press, 1849.