MLA
Cautious Advance : an African American Adult with a Baby Crawling on the Ground and an African American Woman on the Side. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/204rjdfn4d-cor.
APA, 6th edition
Cautious advance : an African American adult with a baby crawling on the ground and an African American woman on the side (Box 72). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/204rjdfn4d-cor.
Chicago
“Cautious Advance : an African American Adult with a Baby Crawling on the Ground and an African American Woman on the Side.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 72. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/204rjdfn4d-cor.