MLA
Oh Boy! Madam Lawson of Los Angeles, Cal. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 73. https://digital.library.emory.edu/purl/477sn02v9b-cor.
APA, 6th edition
Oh boy! Madam Lawson of Los Angeles, Cal. (Box 73). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/477sn02v9b-cor.
Chicago
“Oh Boy! Madam Lawson of Los Angeles, Cal.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 73. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/477sn02v9b-cor.