MLA
Howell, Hugh H. Letter to the Emory Alumnus Magazine from Hugh H. Howell, Member of the Air Force, Pacific Fleet - March 31, 1944. 1944. Robert W. Woodruff Health Sciences Center. Library, Box 1, Folder 8. https://digital.library.emory.edu/purl/9354f4qsth-cor.
APA, 6th edition
Howell, H. H. (1944). Letter to the Emory Alumnus magazine from Hugh H. Howell, member of the Air Force, Pacific Fleet - March 31, 1944 (Box 1, Folder 8) [Clippings (information artifacts)]. Robert W. Woodruff Health Sciences Center. Library. https://digital.library.emory.edu/purl/9354f4qsth-cor.
Chicago
Howell, Hugh H. “Letter to the Emory Alumnus Magazine from Hugh H. Howell, Member of the Air Force, Pacific Fleet - March 31, 1944.” Clippings (information artifacts). Emory Unit Collection, 1944. Box 1, Folder 8. Robert W. Woodruff Health Sciences Center. Library. https://digital.library.emory.edu/purl/9354f4qsth-cor.