MLA
A Boy Sitting in a Chair Holding a Hat, Surrounded by Boxes of Fruits and Vegetables : with Three Other Children in the Picture. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 75. https://digital.library.emory.edu/purl/1676t1g1k4-cor.
APA, 6th edition
A boy sitting in a chair holding a hat, surrounded by boxes of fruits and vegetables : with three other children in the picture (Box 75). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1676t1g1k4-cor.
Chicago
“A Boy Sitting in a Chair Holding a Hat, Surrounded by Boxes of Fruits and Vegetables : with Three Other Children in the Picture.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 75. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1676t1g1k4-cor.