Cite

[Photograph of two boys sitting together in a doorway, one plays the harmonica]

MLA

[Photograph of Two Boys Sitting Together in a Doorway, One Plays the Harmonica]. 1957. https://collections.library.yale.edu/catalog/2067611.

APA, 6th edition

[Photograph of two boys sitting together in a doorway, one plays the harmonica]. (1957). [Negatives]. https://collections.library.yale.edu/catalog/2067611.