MLA

McNally, Rand, and Company. Railroad Map of Illinois : Prepared for the 1878 Report of Railroad and Warehouse Commissioners / by Rand, McNally & Co. Rand McNally & Co., 1878. https://collections.library.yale.edu/catalog/15814402.

APA, 6th edition

McNally, R., & C. (1878). Railroad map of Illinois : prepared for the 1878 Report of Railroad and Warehouse Commissioners / by Rand, McNally & Co. [Maps]. Rand McNally & Co., https://collections.library.yale.edu/catalog/15814402.