MLA

McNally, Rand, and Company. Map of the Chicago & North Western Railway and the Chicago, St. Paul, Minneapolis & Omaha Railway. Rand McNally, 1904. https://collections.library.yale.edu/catalog/15813034.

APA, 6th edition

McNally, R., & C. (1904). Map of the Chicago & North Western Railway and the Chicago, St. Paul, Minneapolis & Omaha Railway. [Maps]. Rand McNally, https://collections.library.yale.edu/catalog/15813034.