MLA
Whitehurst, M. E., and Co. Off for a Joy Ride near New Bern, N.C. : African American Family in an Ox-Drawn Cart next to Dogs. 1911. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 75. https://digital.library.emory.edu/purl/689d51c5df-cor.
APA, 6th edition
Whitehurst, M. E., & C. (1911). Off for a joy ride near New Bern, N.C. : African American family in an ox-drawn cart next to dogs (Box 75) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/689d51c5df-cor.
Chicago
Whitehurst, M.E., and Co. “Off for a Joy Ride near New Bern, N.C. : African American Family in an Ox-Drawn Cart next to Dogs.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1911. Box 75. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/689d51c5df-cor.