MLA
Richt-Art. Colored Folks Cabin, near Walterton, S.C. : an African American Woman with Four Children Standing Outside a Log Cabin : with a Man Sitting Inside. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 71. https://digital.library.emory.edu/purl/627zkh18c8-cor.
APA, 6th edition
R.-A. Colored folks cabin, near Walterton, S.C. : an African American woman with four children standing outside a log cabin : with a man sitting inside (Box 71) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/627zkh18c8-cor.
Chicago
Richt-Art. “Colored Folks Cabin, near Walterton, S.C. : an African American Woman with Four Children Standing Outside a Log Cabin : with a Man Sitting Inside.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 71. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/627zkh18c8-cor.