MLA
My Heart Turned Back to Dixie : an African American Man in a Cotton Field with a Basket of Cotton on His Shoulder [Hand Colored]. 1934. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/1913n5tb64-cor.
APA, 6th edition
My heart turned back to Dixie : an African American man in a cotton field with a basket of cotton on his shoulder [hand colored] (Box 68). (1934). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1913n5tb64-cor.
Chicago
“My Heart Turned Back to Dixie : an African American Man in a Cotton Field with a Basket of Cotton on His Shoulder [Hand Colored].” Postcards. Robert Langmuir African American Photograph Collection, 1934. Box 68. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1913n5tb64-cor.