MLA
James R. Dunlop, Inc. (Washington, D.C.). O'Donnell's sea grills : with two African American waiters. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3720cfxprc-cor.
APA, 6th edition
James R. Dunlop, Inc. (Washington, D.C.). (unknown)[O'Donnell's sea grills : with two African American waiters]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3720cfxprc-cor.
Chicago
James R. Dunlop, Inc. (Washington, D.C.), O'Donnell's sea grills : with two African American waiters, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3720cfxprc-cor.