MLA
Three African American Families Standing in the Doorways of Small Buildings. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 71. https://digital.library.emory.edu/purl/617qnk98vf-cor.
APA, 6th edition
Three African American families standing in the doorways of small buildings (Box 71). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/617qnk98vf-cor.
Chicago
“Three African American Families Standing in the Doorways of Small Buildings.” Photographic 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/617qnk98vf-cor.