[Photograph of Siegfried Sassoon in a riding outfit and George Sassoon]
MLA
[Photograph of Siegfried Sassoon in a Riding Outfit and George Sassoon]. 0AD. https://collections.library.yale.edu/catalog/2012306.
APA, 6th edition
[Photograph of Siegfried Sassoon in a riding outfit and George Sassoon]. (0 C.E.). [Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2012306.