MLA
Where Trouble Abideth Not : African American Man with Two Watermelons. 1907. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 69. https://digital.library.emory.edu/purl/443nvx0k9g-cor.
APA, 6th edition
Where trouble abideth not : African American man with two watermelons (Box 69). (1907). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/443nvx0k9g-cor.
Chicago
“Where Trouble Abideth Not : African American Man with Two Watermelons.” Postcards. Robert Langmuir African American Photograph Collection, 1907. Box 69. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/443nvx0k9g-cor.