MLA
Montgomery Pickaninnies : Three African American Children Standing behind a Fence. 1906. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 73. https://digital.library.emory.edu/purl/3418kprr73-cor.
APA, 6th edition
Montgomery pickaninnies : three African American children standing behind a fence (Box 73). (1906). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3418kprr73-cor.
Chicago
“Montgomery Pickaninnies : Three African American Children Standing behind a Fence.” Postcards. Robert Langmuir African American Photograph Collection, 1906. Box 73. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3418kprr73-cor.