MLA
Danziger & Berman (New Haven, Conn.). Picnic at Riverside Park : New London, Conn. [hand colored]. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/293gxd257f-cor.
APA, 6th edition
Danziger & Berman (New Haven, Conn.). (unknown)[Picnic at Riverside Park : New London, Conn. [hand colored]]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/293gxd257f-cor.
Chicago
Danziger & Berman (New Haven, Conn.), Picnic at Riverside Park : New London, Conn. [hand colored], unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/293gxd257f-cor.