Cite

Official map of the territory of Dakota.

MLA

McNally, Rand, and Company. Official Map of the Territory of Dakota. Issued by the Department of Immigration and Statistics, 0AD. https://collections.library.yale.edu/catalog/15814723.

APA, 6th edition

McNally, R., & C. (0 C.E.). Official map of the territory of Dakota. [Maps]. Issued by the Department of Immigration and Statistics, https://collections.library.yale.edu/catalog/15814723.