MLA
Trepagnier, and Oschwald. Don't Yer Want Er Automobile Yer Own Self? : an African American Boy Pushing Another in a Wheelbarrow, with Cigarettes in Their Mouths. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 72. https://digital.library.emory.edu/purl/508hdr7ss9-cor.
APA, 6th edition
T., & O. Don't yer want er automobile yer own self? : an African American boy pushing another in a wheelbarrow, with cigarettes in their mouths (Box 72) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/508hdr7ss9-cor.
Chicago
Trepagnier, and Oschwald. “Don't Yer Want Er Automobile Yer Own Self? : an African American Boy Pushing Another in a Wheelbarrow, with Cigarettes in Their Mouths.” 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/508hdr7ss9-cor.