MLA
Chamberlain, J. N. An Afternoon Meal, Miami, Fla. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 69. https://digital.library.emory.edu/purl/617qnk98x3-cor.
APA, 6th edition
Chamberlain, J. N. An afternoon meal, Miami, Fla. (Box 69) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/617qnk98x3-cor.
Chicago
Chamberlain, J. N. “An Afternoon Meal, Miami, Fla.” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 69. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/617qnk98x3-cor.