MLA
Plunkett. Margaret Irvin, an African American Woman, Holding a Stick While Sitting in a Chair and Leaning on a Table, Wearing a Dress and a Hat. 1913. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 73. https://digital.library.emory.edu/purl/259c59zw5p-cor.
APA, 6th edition
P. (1913). Margaret Irvin, an African American woman, holding a stick while sitting in a chair and leaning on a table, wearing a dress and a hat (Box 73) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/259c59zw5p-cor.
Chicago
Plunkett. “Margaret Irvin, an African American Woman, Holding a Stick While Sitting in a Chair and Leaning on a Table, Wearing a Dress and a Hat.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1913. Box 73. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/259c59zw5p-cor.