MLA
Bros., Chisholm. Greetings from the Sunny South, Home of the Mountaineer : Men Using Cows to Plow the Field, with Women and Children Standing in Front of a Log Cabin. Stuart A. Rose Manuscript, Archives, and Rare Book Library, Box 71. https://digital.library.emory.edu/purl/573bzkh1b7-cor.
APA, 6th edition
Bros., C. Greetings from the sunny south, home of the mountaineer : men using cows to plow the field, with women and children standing in front of a log cabin (Box 71) [Postcards]. Stuart A. Rose Manuscript, Archives, and Rare Book Library. https://digital.library.emory.edu/purl/573bzkh1b7-cor.
Chicago
Bros., Chisholm. “Greetings from the Sunny South, Home of the Mountaineer : Men Using Cows to Plow the Field, with Women and Children Standing in Front of a Log Cabin.” 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/573bzkh1b7-cor.