MLA
Illustrated Post Card Co. (N.Y.). In the sandy land, Southern Pines, N.C. : African American boy plowing with an ox. May 17, 1968. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/474cnp5hsv-cor.
APA, 6th edition
Illustrated Post Card Co. (N.Y.). (May 17, 1968)[In the sandy land, Southern Pines, N.C. : African American boy plowing with an ox]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/474cnp5hsv-cor.
Chicago
Illustrated Post Card Co. (N.Y.), In the sandy land, Southern Pines, N.C. : African American boy plowing with an ox, May 17, 1968, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/474cnp5hsv-cor.