MLA
Arts., Beaux. St. Martin. N.P. Salt-Lake : a Group of Children, with One Man in the Distance, Posing in Front of the Lake. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 75. https://digital.library.emory.edu/purl/566j0zpc8n-cor.
APA, 6th edition
Arts., B. St. Martin. N.P. Salt-Lake : a group of children, with one man in the distance, posing in front of the lake (Box 75) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/566j0zpc8n-cor.
Chicago
Arts., Beaux. “St. Martin. N.P. Salt-Lake : a Group of Children, with One Man in the Distance, Posing in Front of the Lake.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 75. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/566j0zpc8n-cor.