Cite

Photographs of Captain Luther H. North and of Pawnee Indian scouts [graphic].

MLA

Photographs of Captain Luther H. North and of Pawnee Indian Scouts [Graphic]. 0AD. https://collections.library.yale.edu/catalog/2020243.

APA, 6th edition

Photographs of Captain Luther H. North and of Pawnee Indian scouts [graphic]. (0 C.E.). [Portraits, Pictorial works, Postcards, Card photographs (photographs), Photographic prints]. https://collections.library.yale.edu/catalog/2020243.