Cite

[Photograph of Siegfried Sassoon sitting in a wingback chair]

MLA

[Photograph of Siegfried Sassoon Sitting in a Wingback Chair]. 0AD. https://collections.library.yale.edu/catalog/2012300.

APA, 6th edition

[Photograph of Siegfried Sassoon sitting in a wingback chair]. (0 C.E.). [Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2012300.