MLA

Owen, David Dale, 1807-1860. Geological chart of part of Iowa, Wisconsin, and Illinois / by D.D. Owen.. BRBL_00561. between 1844 and 1899?]. https://collections.library.yale.edu/catalog/15814627.

APA, 6th edition

Owen, David Dale, 1807-1860. (["BRBL_00561"])(between 1844 and 1899?])[Geological chart of part of Iowa, Wisconsin, and Illinois / by D.D. Owen.]. https://collections.library.yale.edu/catalog/15814627.