MLA
Boiling Soap : an African American Woman Stirring a Pot of Soap [Hand Colored]. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 71. https://digital.library.emory.edu/purl/9117m0cg2x-cor.
APA, 6th edition
Boiling soap : an African American woman stirring a pot of soap [hand colored] (Box 71). [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/9117m0cg2x-cor.
Chicago
“Boiling Soap : an African American Woman Stirring a Pot of Soap [Hand Colored].” Photographic postcards. Robert Langmuir African American Photograph Collection, n.d. Box 71. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/9117m0cg2x-cor.