MLA

Gallery, Martin's Art. Photographs of Minnesota and Portraits of Sioux Indian Prisoners [Graphic]. Martin's Art Gallery, 1862. https://collections.library.yale.edu/catalog/2009525.

APA, 6th edition

Gallery, M. A. (1862). Photographs of Minnesota and portraits of Sioux Indian prisoners [graphic]. [Portraits, Pictorial works, Cartes-de-visite, Card photographs (photographs), Photographic prints]. Martin's Art Gallery. https://collections.library.yale.edu/catalog/2009525.