Cite

Map of Cook and DuPage Counties, Illinois : with part of Lake County, Indiana.

MLA

Map of Cook and DuPage Counties, Illinois : with Part of Lake County, Indiana. Rand McNally & Co., 1887. https://collections.library.yale.edu/catalog/15814427.

APA, 6th edition

Map of Cook and DuPage Counties, Illinois : with part of Lake County, Indiana. (1887). [Maps]. Rand McNally & Co., https://collections.library.yale.edu/catalog/15814427.