MLA
Summer, Oscar. Portrait of an African American Woman with an Umbrella next to a Fence. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 62. https://digital.library.emory.edu/purl/13331zcrn1-cor.
APA, 6th edition
Summer, O. Portrait of an African American woman with an umbrella next to a fence (Box 62) [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/13331zcrn1-cor.
Chicago
Summer, Oscar. “Portrait of an African American Woman with an Umbrella next to a Fence.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, n.d. Box 62. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/13331zcrn1-cor.