MLA
Colourpicture Publishers, Inc. Greetings from down South in the Land of Cotton : African American Men, Women and Children Picking Cotton. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/436tx95x92-cor.
APA, 6th edition
Colourpicture Publishers, I. Greetings from down South in the land of cotton : African American men, women and children picking cotton (Box 68) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/436tx95x92-cor.
Chicago
Colourpicture Publishers, Inc. “Greetings from down South in the Land of Cotton : African American Men, Women and Children Picking Cotton.” Photographic 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/436tx95x92-cor.