MLA
Mabel and Eddie Pitts in a Wicker Seat That Says Earl. 1914. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 75. https://digital.library.emory.edu/purl/81937pvmg4-cor.
APA, 6th edition
Mabel and Eddie Pitts in a wicker seat that says Earl (Box 75). (1914). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/81937pvmg4-cor.
Chicago
“Mabel and Eddie Pitts in a Wicker Seat That Says Earl.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1914. Box 75. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/81937pvmg4-cor.