MLA
An African American Man Wearing a Suit Standing by an Emergency Exit Sign Playing an Electric Guitar with Cartoon Line Drawing of a Man on Horseback Wearing a Pistol and a Cartoon Line Drawing of a Woman behind Him. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 27. https://digital.library.emory.edu/purl/805fbg79jd-cor.
APA, 6th edition
An African American man wearing a suit standing by an emergency exit sign playing an electric guitar with cartoon line drawing of a man on horseback wearing a pistol and a cartoon line drawing of a woman behind him (Box 27). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/805fbg79jd-cor.
Chicago
“An African American Man Wearing a Suit Standing by an Emergency Exit Sign Playing an Electric Guitar with Cartoon Line Drawing of a Man on Horseback Wearing a Pistol and a Cartoon Line Drawing of a Woman behind Him.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, n.d. Box 27. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/805fbg79jd-cor.