MLA
Literary, Boston, and Historical Association. Boston Literary and Historical Association Annual Picnic Flier, Bass Point, Nahant, August 24, 1908. 1908. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 2, Folder 31. https://digital.library.emory.edu/purl/689d51c6t4-cor.
APA, 6th edition
Literary, B., & Association., H. (1908). Boston Literary and Historical Association annual picnic flier, Bass Point, Nahant, August 24, 1908 (Box 2, Folder 31) [Fliers]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/689d51c6t4-cor.
Chicago
Literary, Boston, and Historical Association. “Boston Literary and Historical Association Annual Picnic Flier, Bass Point, Nahant, August 24, 1908.” Fliers. William H. Scott Family Papers, 1848-1982, 1908. Box 2, Folder 31. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/689d51c6t4-cor.