MLA
Watching the Circus Go by : an African American Boy and Girl Sitting on a Fence, with a Donkey behind Them [Hand Colored]. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/846d2547gn-cor.
APA, 6th edition
Watching the circus go by : an African American boy and girl sitting on a fence, with a donkey behind them [hand colored] (Box 72). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/846d2547gn-cor.
Chicago
“Watching the Circus Go by : an African American Boy and Girl Sitting on a Fence, with a Donkey behind Them [Hand Colored].” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/846d2547gn-cor.