MLA
A.L. Macbeth Studio (Baltimore, Md.). Oval picture of Balt Macbeth. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/000000008w-cor.
APA, 6th edition
A.L. Macbeth Studio (Baltimore, Md.). (unknown)[Oval picture of Balt Macbeth]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/000000008w-cor.
Chicago
A.L. Macbeth Studio (Baltimore, Md.), Oval picture of Balt Macbeth, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/000000008w-cor.