MLA

Douglas, Norman, 1868-1952. "Memoirs of Golden Russia:" typescript. Box 31, folder 536. undated. https://collections.library.yale.edu/catalog/16454722.

APA, 6th edition

Douglas, Norman, 1868-1952. (["Box 31, folder 536"])(undated)["Memoirs of Golden Russia:" typescript]. https://collections.library.yale.edu/catalog/16454722.