MLA
Hanson, J. Edward. A Bunch of Piccaninnies at Pass Christian, Miss. : Nine African American Children and One Woman Standing Outside a House [Hand Colored]. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 73. https://digital.library.emory.edu/purl/4816m905sm-cor.
APA, 6th edition
Hanson, J. E. A bunch of piccaninnies at Pass Christian, Miss. : nine African American children and one woman standing outside a house [hand colored] (Box 73) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4816m905sm-cor.
Chicago
Hanson, J. Edward. “A Bunch of Piccaninnies at Pass Christian, Miss. : Nine African American Children and One Woman Standing Outside a House [Hand Colored].” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 73. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4816m905sm-cor.