MLA
Boys Scouts in and out of Uniform, Some of Them Holding Flags, and Musical Instruments [Hand Colored]. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 69. https://digital.library.emory.edu/purl/450gtht79q-cor.
APA, 6th edition
Boys Scouts in and out of uniform, some of them holding flags, and musical instruments [hand colored] (Box 69). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/450gtht79q-cor.
Chicago
“Boys Scouts in and out of Uniform, Some of Them Holding Flags, and Musical Instruments [Hand Colored].” 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/450gtht79q-cor.