MLA
Backstrom, T. E. 1893. Oxford College Library (Oxford, Ga.), Box 4, Folder 1. https://digital.library.emory.edu/purl/805fbg7bcj-cor.
APA, 6th edition
Backstrom, T. E. (Box 4, Folder 1). (1893). [Black-and-white photographs]. Oxford College Library (Oxford, Ga.). https://digital.library.emory.edu/purl/805fbg7bcj-cor.
Chicago
“Backstrom, T. E.” Black-and-white photographs. Early Emory College Photographs, 1893. Box 4, Folder 1. Oxford College Library (Oxford, Ga.). https://digital.library.emory.edu/purl/805fbg7bcj-cor.