MLA
Frohman, L. H. Painting of Rev. W. Lawson Holding a Cigar, and His Wife Nancy Holding a Book. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 69. https://digital.library.emory.edu/purl/764gmsbcgg-cor.
APA, 6th edition
Frohman, L. H. Painting of Rev. W. Lawson holding a cigar, and his wife Nancy holding a book (Box 69) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/764gmsbcgg-cor.
Chicago
Frohman, L H. “Painting of Rev. W. Lawson Holding a Cigar, and His Wife Nancy Holding a Book.” 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/764gmsbcgg-cor.