MLA
Seeley, James T. Picking Ducks for Market on Duck Farm, Westhampton, L.I. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 69. https://digital.library.emory.edu/purl/986b2rbp3b-cor.
APA, 6th edition
Seeley, J. T. Picking ducks for market on duck farm, Westhampton, L.I. (Box 69) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/986b2rbp3b-cor.
Chicago
Seeley, James T. “Picking Ducks for Market on Duck Farm, Westhampton, L.I.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 69. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/986b2rbp3b-cor.