Cite

Geographical, statistical, and historical map of Illinois [cartographic material] / J. Yeager sculp.

MLA

Yeager, Joseph, approximately 1792-1859. Geographical, statistical, and historical map of Illinois [cartographic material] / J. Yeager sculp.. BRBL_00547. [1822]. https://collections.library.yale.edu/catalog/15814408.

APA, 6th edition

Yeager, Joseph, approximately 1792-1859. (["BRBL_00547"])([1822])[Geographical, statistical, and historical map of Illinois [cartographic material] / J. Yeager sculp.]. https://collections.library.yale.edu/catalog/15814408.