MLA
Allgood, Susie W. Expectation : an African American Man Holding an Opossum over a Table with Potatoes on It, and Three Other African American Boys and a Dog. 1909. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 69. https://digital.library.emory.edu/purl/525k98sfbk-cor.
APA, 6th edition
Allgood, S. W. (1909). Expectation : an African American man holding an opossum over a table with potatoes on it, and three other African American boys and a dog (Box 69) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/525k98sfbk-cor.
Chicago
Allgood, Susie W. “Expectation : an African American Man Holding an Opossum over a Table with Potatoes on It, and Three Other African American Boys and a Dog.” 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/525k98sfbk-cor.