Cite

The lands within the bold boundary were included, at some time or other, but never all at the same time, in Dakota Territory

MLA

Commission, Dakota Territory Centennial. The Lands within the Bold Boundary Were Included, at Some Time or Other, but Never All at the Same Time, in Dakota Territory. 0AD. https://collections.library.yale.edu/catalog/2029006.

APA, 6th edition

Commission, D. T. C. (0 C.E.). The lands within the bold boundary were included, at some time or other, but never all at the same time, in Dakota Territory [Halftones, Maps]. https://collections.library.yale.edu/catalog/2029006.