MLA
Seltzer, Leo. Man with Fist up and Sign That Says N.R.A., We Will Never Forget. 1936. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 7. https://digital.library.emory.edu/purl/3311ns1rsq-cor.
APA, 6th edition
Seltzer, L. (1936). Man with fist up and sign that says N.R.A., We Will Never Forget (Box 7) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3311ns1rsq-cor.
Chicago
Seltzer, Leo. “Man with Fist up and Sign That Says N.R.A., We Will Never Forget.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, 1936. Box 7. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3311ns1rsq-cor.