MLA

Combs, and Whitney. Red River Ox Carts. 0AD. https://collections.library.yale.edu/catalog/2014261.

APA, 6th edition

C., & W. (0 C.E.). Red River ox carts. [Cartes-de-visite, Photograph albums, Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2014261.