Cite

Johnson's Illinois / by Johnson and Ward.

MLA

Johnson, and Ward. Johnson's Illinois / by Johnson and Ward. Johnson and Ward, 0AD. https://collections.library.yale.edu/catalog/15814399.

APA, 6th edition

J., & W. (0 C.E.). Johnson's Illinois / by Johnson and Ward. [Maps]. Johnson and Ward, https://collections.library.yale.edu/catalog/15814399.