MLA
Possumbilities of the South : an African American Boy Holding an Oppusum by the Tale. 1969. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 69. https://digital.library.emory.edu/purl/969866t1m5-cor.
APA, 6th edition
Possumbilities of the South : an African American boy holding an oppusum by the tale (Box 69). (1969). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/969866t1m5-cor.
Chicago
“Possumbilities of the South : an African American Boy Holding an Oppusum by the Tale.” Postcards. Robert Langmuir African American Photograph Collection, 1969. Box 69. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/969866t1m5-cor.