MLA
Josina Abiatar Machel, Posing with a Machine Gun Slung over the Shoulder. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 1. https://digital.library.emory.edu/purl/559q2bvqfb-cor.
APA, 6th edition
Josina Abiatar Machel, posing with a machine gun slung over the shoulder (Box 1). [Black-and-white photographs]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/559q2bvqfb-cor.
Chicago
“Josina Abiatar Machel, Posing with a Machine Gun Slung over the Shoulder.” Black-and-white photographs. Robert Langmuir African American Photograph Collection, n.d. Box 1. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/559q2bvqfb-cor.