MLA
A.L. Macbeth Studio (Baltimore, Md.). Group of African American men, some of them cooks, posing in front of buildings. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/494vhhmgw8-cor.
APA, 6th edition
A.L. Macbeth Studio (Baltimore, Md.). (unknown)[Group of African American men, some of them cooks, posing in front of buildings]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/494vhhmgw8-cor.
Chicago
A.L. Macbeth Studio (Baltimore, Md.), Group of African American men, some of them cooks, posing in front of buildings, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/494vhhmgw8-cor.