MLA
Souvenir Post Card Co. (N.Y.). Rag pickers : African American boys and girls carrying large sacks. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3009w0vt7q-cor.
APA, 6th edition
Souvenir Post Card Co. (N.Y.). (unknown)[Rag pickers : African American boys and girls carrying large sacks]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3009w0vt7q-cor.
Chicago
Souvenir Post Card Co. (N.Y.), Rag pickers : African American boys and girls carrying large sacks, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3009w0vt7q-cor.