MLA
Elcha (New York, N.Y.). African American man. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6623bk3jh9-cor.
APA, 6th edition
Elcha (New York, N.Y.). (unknown)[African American man]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6623bk3jh9-cor.
Chicago
Elcha (New York, N.Y.), African American man, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6623bk3jh9-cor.