MLA
Nigger Head, Lake Coeur d'Alene, Idaho. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 71. https://digital.library.emory.edu/purl/1504xgxd3q-cor.
APA, 6th edition
Nigger Head, Lake Coeur d'Alene, Idaho (Box 71). [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1504xgxd3q-cor.
Chicago
“Nigger Head, Lake Coeur d'Alene, Idaho.” Postcards. Robert Langmuir African American Photograph Collection, n.d. Box 71. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/1504xgxd3q-cor.