MLA
Typogravure. Charles Calvert : a Painting of a Boy and an African American Boy Holding a Drum. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 69. https://digital.library.emory.edu/purl/4579s4mw9d-cor.
APA, 6th edition
T. Charles Calvert : a painting of a boy and an African American boy holding a drum (Box 69) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4579s4mw9d-cor.
Chicago
Typogravure. “Charles Calvert : a Painting of a Boy and an African American Boy Holding a Drum.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 69. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4579s4mw9d-cor.