MLA
Hungerford, Newman. A Group of Don't Worries : Eight African American Children Posing Together in Front of a Wooden Fence. 1906. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/105s7h44kr-cor.
APA, 6th edition
Hungerford, N. (1906). A group of don't worries : eight African American children posing together in front of a wooden fence (Box 72) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/105s7h44kr-cor.
Chicago
Hungerford, Newman. “A Group of Don't Worries : Eight African American Children Posing Together in Front of a Wooden Fence.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1906. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/105s7h44kr-cor.