Cite

[Railroads of the Northern United States from Iowa to Boston, Massachusetts]

MLA

[Railroads of the Northern United States from Iowa to Boston, Massachusetts]. s.n., 186AD. https://collections.library.yale.edu/catalog/15604001.

APA, 6th edition

[Railroads of the Northern United States from Iowa to Boston, Massachusetts]. (186 C.E.). [Maps]. s.n., https://collections.library.yale.edu/catalog/15604001.