Upper Agency of Sioux, Minnesota Valley. Aug 30
MLA
Sully, Alfred, 1821-1879. Upper Agency of Sioux, Minnesota Valley. Aug 30. [ca. 1856]. https://collections.library.yale.edu/catalog/2019816.
APA, 6th edition
Sully, Alfred, 1821-1879. ([ca. 1856])[Upper Agency of Sioux, Minnesota Valley. Aug 30]. https://collections.library.yale.edu/catalog/2019816.