MLA
African American Man and Woman Posing in a Prop Jail Cell, with a Sign Reading Long Beach Jail above Them. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/006sxksn20-cor.
APA, 6th edition
African American man and woman posing in a prop jail cell, with a sign reading Long Beach Jail above them (Box 72). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/006sxksn20-cor.
Chicago
“African American Man and Woman Posing in a Prop Jail Cell, with a Sign Reading Long Beach Jail above Them.” Photographic 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/006sxksn20-cor.