MLA
Blank, and Inc. Stoller. Unidentified Speakers and Entertainers - Portrait Photograph of a Unidentified Man. 1940. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 7, Folder 1. https://digital.library.emory.edu/purl/566j0zpcvm-cor.
APA, 6th edition
B., & Stoller, I. (1940). Unidentified Speakers and Entertainers - Portrait photograph of a unidentified man (Box 7, Folder 1) [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/566j0zpcvm-cor.
Chicago
Blank, and Inc. Stoller. “Unidentified Speakers and Entertainers - Portrait Photograph of a Unidentified Man.” Black-and-white photographs. Emory University Office of Alumni Publications Photographs, 1940. Box 7, Folder 1. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/566j0zpcvm-cor.