MLA

Douglas, Norman, 1868-1952. "W" General. Box 46. 1947-1948. https://collections.library.yale.edu/catalog/16454770.

APA, 6th edition

Douglas, Norman, 1868-1952. (["Box 46"])(1947-1948)["W" General]. https://collections.library.yale.edu/catalog/16454770.