MLA
Eddy, E. C. Cotton Picking Time in Southern Pines, N.C. 1914. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 68. https://digital.library.emory.edu/purl/8945qfttjn-cor.
APA, 6th edition
Eddy, E. C. (1914). Cotton picking time in Southern Pines, N.C. (Box 68) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/8945qfttjn-cor.
Chicago
Eddy, E. C. “Cotton Picking Time in Southern Pines, N.C.” Postcards. Robert Langmuir African American Photograph Collection, 1914. Box 68. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/8945qfttjn-cor.