MLA

Rogers, Bruce, 1870-1957. Letter from Geoffrey Cumberlege, Oxford University Press, re: new edition of T. E. Lawrence's Odyssey. Box 1, folder 8. 1934 Apr 18. https://collections.library.yale.edu/catalog/16624859.

APA, 6th edition

Rogers, Bruce, 1870-1957. (["Box 1, folder 8"])(1934 Apr 18)[Letter from Geoffrey Cumberlege, Oxford University Press, re: new edition of T. E. Lawrence's Odyssey]. https://collections.library.yale.edu/catalog/16624859.