Cite

Chapman's rail road map of Ohio, Indiana, Michigan, Illinois, Missouri, Minnesota, & Wisconsin.

MLA

Chapman, Silas. Chapman's Rail Road Map of Ohio, Indiana, Michigan, Illinois, Missouri, Minnesota, & Wisconsin. S. Chapman, 1859. https://collections.library.yale.edu/catalog/15603999.

APA, 6th edition

Chapman, S. (1859). Chapman's rail road map of Ohio, Indiana, Michigan, Illinois, Missouri, Minnesota, & Wisconsin. [Maps]. S. Chapman, https://collections.library.yale.edu/catalog/15603999.