MLA
Kuhli, L. F. (Louis F.), approximately 1873-. The Weaver Brothers Trio sitting in chairs on a rug holding different stringed instruments, in front of a curtain. unknown. Robert Langmuir African American Photograph Collection. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6558cz8wfc-cor.
APA, 6th edition
Kuhli, L. F. (Louis F.), approximately 1873-. (unknown)[The Weaver Brothers Trio sitting in chairs on a rug holding different stringed instruments, in front of a curtain]. Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6558cz8wfc-cor.
Chicago
Kuhli, L. F. (Louis F.), approximately 1873-, The Weaver Brothers Trio sitting in chairs on a rug holding different stringed instruments, in front of a curtain, unknown, Robert Langmuir African American Photograph Collection, Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/6558cz8wfc-cor.