MLA
Leach, Dixie W. My Heart Turns Back to Dixie : Portrait of an African American Man Wearing a Hat. 1907. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/2150gb5mnj-cor.
APA, 6th edition
Leach, D. W. (1907). My heart turns back to Dixie : portrait of an African American man wearing a hat (Box 72) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/2150gb5mnj-cor.
Chicago
Leach, Dixie W. “My Heart Turns Back to Dixie : Portrait of an African American Man Wearing a Hat.” Postcards. Robert Langmuir African American Photograph Collection, 1907. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/2150gb5mnj-cor.