MLA
Lincoln and the Contrabands : Abraham Lincoln Speaking to a Group of Slaves, with a Soldier, and Other Women Standing near Him [Hand Colored]. 1912. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 70. https://digital.library.emory.edu/purl/883xsj3v2b-cor.
APA, 6th edition
Lincoln and the contrabands : Abraham Lincoln speaking to a group of slaves, with a soldier, and other women standing near him [hand colored] (Box 70). (1912). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/883xsj3v2b-cor.
Chicago
“Lincoln and the Contrabands : Abraham Lincoln Speaking to a Group of Slaves, with a Soldier, and Other Women Standing near Him [Hand Colored].” Postcards. Robert Langmuir African American Photograph Collection, 1912. Box 70. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/883xsj3v2b-cor.