MLA
Helen Royston as a Girl Standing Holding onto a Child's Chair in Front of Sofa in a Living Room. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 6. https://digital.library.emory.edu/purl/416c2fqzcr-cor.
APA, 6th edition
Helen Royston as a girl standing holding onto a child's chair in front of sofa in a living room (Box 6). [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/416c2fqzcr-cor.
Chicago
“Helen Royston as a Girl Standing Holding onto a Child's Chair in Front of Sofa in a Living Room.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, n.d. Box 6. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/416c2fqzcr-cor.