Cite

Map of the Department of Dakota : including Minnesota, Dakota and Montana / compiled and drawn under the direction of John Biddle by E.H. Rakowicz.

MLA

Rakowicz, E. H. Map of the Department of Dakota : Including Minnesota, Dakota and Montana / Compiled and Drawn under the Direction of John Biddle by E.H. Rakowicz. Office of the Chief of Engineers, 1886. https://collections.library.yale.edu/catalog/15814722.

APA, 6th edition

Rakowicz, E. H. (1886). Map of the Department of Dakota : including Minnesota, Dakota and Montana / compiled and drawn under the direction of John Biddle by E.H. Rakowicz. [Maps]. Office of the Chief of Engineers, https://collections.library.yale.edu/catalog/15814722.