MLA
Souvenir Post Card Co. (N.Y.). Taking their sun bath : four African American children [hand colored]. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/102c866t36-cor.
APA, 6th edition
Souvenir Post Card Co. (N.Y.). (unknown)[Taking their sun bath : four African American children [hand colored]]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/102c866t36-cor.
Chicago
Souvenir Post Card Co. (N.Y.), Taking their sun bath : four African American children [hand colored], unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/102c866t36-cor.