Cite

[Photograph of Siegfried Sassoon and Hester Gatty Sassoon sitting on a ledge]

MLA

[Photograph of Siegfried Sassoon and Hester Gatty Sassoon Sitting on a Ledge]. 0AD. https://collections.library.yale.edu/catalog/2012308.

APA, 6th edition

[Photograph of Siegfried Sassoon and Hester Gatty Sassoon sitting on a ledge]. (0 C.E.). [Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2012308.