MLA
Legerton, C. L. Two of a Kind : Two African American Boys with Shoe Shining Tools. 1900. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/689d51c5cw-cor.
APA, 6th edition
Legerton, C. L. (1900). Two of a kind : two African American boys with shoe shining tools (Box 72) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/689d51c5cw-cor.
Chicago
Legerton, C. L. “Two of a Kind : Two African American Boys with Shoe Shining Tools.” Postcards. Robert Langmuir African American Photograph Collection, 1900. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/689d51c5cw-cor.