MLA
Man by Cars Pointing at Sign Advertising Four-Eyed Bull and Two-Headed Calf. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 16. https://digital.library.emory.edu/purl/69673n5tmm-cor.
APA, 6th edition
Man by cars pointing at sign advertising four-eyed bull and two-headed calf (Box 16). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/69673n5tmm-cor.
Chicago
“Man by Cars Pointing at Sign Advertising Four-Eyed Bull and Two-Headed Calf.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, n.d. Box 16. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/69673n5tmm-cor.