MLA
Lambert. African American Woman Sitting on a Chair Reading a Book to Her Two Girls, with an African American Man Sitting in Another Chair, in Front of a Fireplace. 1957. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 74. https://digital.library.emory.edu/purl/102c866t3r-cor.
APA, 6th edition
L. (1957). African American woman sitting on a chair reading a book to her two girls, with an African American man sitting in another chair, in front of a fireplace (Box 74) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/102c866t3r-cor.
Chicago
Lambert. “African American Woman Sitting on a Chair Reading a Book to Her Two Girls, with an African American Man Sitting in Another Chair, in Front of a Fireplace.” Postcards. Robert Langmuir African American Photograph Collection, 1957. Box 74. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/102c866t3r-cor.