MLA

Douglas, Norman, 1868-1952. Conrad, Jessie. Box 17, folder 232. 1905-1936. https://collections.library.yale.edu/catalog/16454709.

APA, 6th edition

Douglas, Norman, 1868-1952. (["Box 17, folder 232"])(1905-1936)[Conrad, Jessie]. https://collections.library.yale.edu/catalog/16454709.