MLA
Allgood, Susie W. I'Ll Wah You Chiluns out : an African American Women with a Boy and Girl Outside a Log Cabin. 1909. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/177fqz613g-cor.
APA, 6th edition
Allgood, S. W. (1909). I'll wah you chiluns out : an African American women with a boy and girl outside a log cabin (Box 72) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/177fqz613g-cor.
Chicago
Allgood, Susie W. “I'Ll Wah You Chiluns out : an African American Women with a Boy and Girl Outside a Log Cabin.” Postcards. Robert Langmuir African American Photograph Collection, 1909. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/177fqz613g-cor.