MLA
Allgood, Susie W. A Georgia Family Tree : an African American Man with Several Opossums in a Tree and Holding One. 1909. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 69. https://digital.library.emory.edu/purl/0687h44j3n-cor.
APA, 6th edition
Allgood, S. W. (1909). A Georgia family tree : an African American man with several opossums in a tree and holding one (Box 69) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0687h44j3n-cor.
Chicago
Allgood, Susie W. “A Georgia Family Tree : an African American Man with Several Opossums in a Tree and Holding One.” Postcards. Robert Langmuir African American Photograph Collection, 1909. Box 69. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/0687h44j3n-cor.