Cite

[Photograph of a young boy riding his bicycle uphill with a castle in the background]

MLA

[Photograph of a Young Boy Riding His Bicycle Uphill with a Castle in the Background]. 1950. https://collections.library.yale.edu/catalog/2067777.

APA, 6th edition

[Photograph of a young boy riding his bicycle uphill with a castle in the background]. (1950). [Photographic prints, Photographs]. https://collections.library.yale.edu/catalog/2067777.