MLA
Jantzen, C. F. Wilhelm. His Excellency Edwin Barclay, President of the Republic of Liberia. 1936. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 75. https://digital.library.emory.edu/purl/136h189322-cor.
APA, 6th edition
Jantzen, C. F. W. (1936). His Excellency Edwin Barclay, President of the Republic of Liberia (Box 75) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/136h189322-cor.
Chicago
Jantzen, C. F. Wilhelm. “His Excellency Edwin Barclay, President of the Republic of Liberia.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1936. Box 75. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/136h189322-cor.