MLA
An Old African American Man Wearing Overalls and a Hat, Holding onto a Cow. 1912. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/477sn02v93-cor.
APA, 6th edition
An old African American man wearing overalls and a hat, holding onto a cow (Box 72). (1912). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/477sn02v93-cor.
Chicago
“An Old African American Man Wearing Overalls and a Hat, Holding onto a Cow.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1912. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/477sn02v93-cor.