MLA
In the Cotton Fields : a Group of African American Men and African American Women with Bags over Their Shoulders Picking Cotton [Hand Colored]. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/3074tmpg7p-cor.
APA, 6th edition
In the cotton fields : a group of African American men and African American women with bags over their shoulders picking cotton [hand colored] (Box 68). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3074tmpg7p-cor.
Chicago
“In the Cotton Fields : a Group of African American Men and African American Women with Bags over Their Shoulders Picking Cotton [Hand Colored].” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 68. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3074tmpg7p-cor.