MLA
Weintrob, Leo. Portrait of a Policeman Standing with Left Arm Bent and Thumb Hooked in Belt. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 8. https://digital.library.emory.edu/purl/556931zcz2-cor.
APA, 6th edition
Weintrob, L. Portrait of a policeman standing with left arm bent and thumb hooked in belt (Box 8) [Card photographs (photographs)]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/556931zcz2-cor.
Chicago
Weintrob, Leo. “Portrait of a Policeman Standing with Left Arm Bent and Thumb Hooked in Belt.” Card photographs (photographs). Robert Langmuir African American Photograph Collection, n.d. Box 8. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/556931zcz2-cor.