MLA
Collins, James, Jr. Collins Diarrhea Cordial Flier, No Date. 1848. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 2, Folder 44. https://digital.library.emory.edu/purl/4300zpc9mm-cor.
APA, 6th edition
Collins, J., Jr. (1848). Collins Diarrhea Cordial flier, no date (Box 2, Folder 44) [Fliers]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4300zpc9mm-cor.
Chicago
Collins, James, Jr. “Collins Diarrhea Cordial Flier, No Date.” Fliers. William H. Scott Family Papers, 1848-1982, 1848. Box 2, Folder 44. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/4300zpc9mm-cor.