MLA

Douglas, Norman, 1868-1952. "G" General. Box 45. 1937-1947. https://collections.library.yale.edu/catalog/16454729.

APA, 6th edition

Douglas, Norman, 1868-1952. (["Box 45"])(1937-1947)["G" General]. https://collections.library.yale.edu/catalog/16454729.