MLA
Souvenir Post Card Co. (New York, N.Y.). Rapid transit : African American man in an ox-drawn cart. January 1909. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/84302v6x0p-cor.
APA, 6th edition
Souvenir Post Card Co. (New York, N.Y.). (January 1909)[Rapid transit : African American man in an ox-drawn cart]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/84302v6x0p-cor.
Chicago
Souvenir Post Card Co. (New York, N.Y.), Rapid transit : African American man in an ox-drawn cart, January 1909, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/84302v6x0p-cor.