MLA
Elcha (New York, N.Y.). Portrait of a woman in a dress. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3418kprrb0-cor.
APA, 6th edition
Elcha (New York, N.Y.). (unknown)[Portrait of a woman in a dress]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3418kprrb0-cor.
Chicago
Elcha (New York, N.Y.), Portrait of a woman in a dress, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3418kprrb0-cor.