MLA

McNally, Rand, and Company. Railroad Commissioners' Map of Minnesota / Engraved and Published by Rand, McNally & Co. Rand McNally, 0AD. https://collections.library.yale.edu/catalog/15814608.

APA, 6th edition

McNally, R., & C. (0 C.E.). Railroad commissioners' map of Minnesota / engraved and published by Rand, McNally & Co. [Maps]. Rand McNally, https://collections.library.yale.edu/catalog/15814608.