MLA
Wassmund, H. African American Marching Band in Uniforms, Posing with Their Instruments. 1901. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 70. https://digital.library.emory.edu/purl/3720cfxpsv-cor.
APA, 6th edition
Wassmund, H. (1901). African American marching band in uniforms, posing with their instruments (Box 70) [Photographic postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3720cfxpsv-cor.
Chicago
Wassmund, H. “African American Marching Band in Uniforms, Posing with Their Instruments.” Photographic postcards. Robert Langmuir African American Photograph Collection, 1901. Box 70. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/3720cfxpsv-cor.