MLA

Leaders of the Hostile Indians at Pine Ridge Agcy S.D.; Chief Two Strike, Chief Crow Dog, Chief High Hawk. 1890. https://collections.library.yale.edu/catalog/2001348.

APA, 6th edition

Leaders of the Hostile Indians at Pine Ridge Agcy S.D.; Chief Two Strike, Chief Crow Dog, Chief High Hawk. (1890). [Card photograph albums, Card photographs]. https://collections.library.yale.edu/catalog/2001348.