MLA
Asheville Post Card Co. (Asheville, N.C.). Ethel Beck Home in Knoxville, Tenn.. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/511xd254bm-cor.
APA, 6th edition
Asheville Post Card Co. (Asheville, N.C.). (unknown)[Ethel Beck Home in Knoxville, Tenn.]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/511xd254bm-cor.
Chicago
Asheville Post Card Co. (Asheville, N.C.), Ethel Beck Home in Knoxville, Tenn., unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/511xd254bm-cor.