MLA
Asheville Post Card Co. (Asheville, N.C.). Nine coons, count 'em, in Dixieland : an African American man with nine opossums. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/180vq83bp7-cor.
APA, 6th edition
Asheville Post Card Co. (Asheville, N.C.). (unknown)[Nine coons, count 'em, in Dixieland : an African American man with nine opossums]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/180vq83bp7-cor.
Chicago
Asheville Post Card Co. (Asheville, N.C.), Nine coons, count 'em, in Dixieland : an African American man with nine opossums, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/180vq83bp7-cor.