MLA
Teich, Curt, and Co. Dark Angels : Two African American Boys with Wings. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/27312jm65h-cor.
APA, 6th edition
Teich, C., & C. Dark angels : two African American boys with wings (Box 72) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/27312jm65h-cor.
Chicago
Teich, Curt, and Co. “Dark Angels : Two African American Boys with Wings.” 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/27312jm65h-cor.