MLA
Allgood, Susie W. Taint No Sin to Eat Possum : an African American Family Eating at a Table in a Log Cabin. 1909. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 69. https://digital.library.emory.edu/purl/13331zcrnr-cor.
APA, 6th edition
Allgood, S. W. (1909). Taint no Sin to Eat Possum : an African American family eating at a table in a log cabin (Box 69) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/13331zcrnr-cor.
Chicago
Allgood, Susie W. “Taint No Sin to Eat Possum : an African American Family Eating at a Table in a Log Cabin.” 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/13331zcrnr-cor.