MLA
Allgood, Susie W. A Barnyard Gathering in Opossum Land : an African American Woman Holding a Chicken, Surrounded by Chickens : with Two Log Cabins. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 71. https://digital.library.emory.edu/purl/805fbg79g3-cor.
APA, 6th edition
Allgood, S. W. A barnyard gathering in opossum land : an African American woman holding a chicken, surrounded by chickens : with two log cabins (Box 71) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/805fbg79g3-cor.
Chicago
Allgood, Susie W. “A Barnyard Gathering in Opossum Land : an African American Woman Holding a Chicken, Surrounded by Chickens : with Two Log Cabins.” 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/805fbg79g3-cor.