MLA

Wright, Richard, 1908-1960. Harper & Brothers Publishers. Box 99, folder 1381-1383. 1943-60. https://collections.library.yale.edu/catalog/2005263.

APA, 6th edition

Wright, Richard, 1908-1960. (["Box 99, folder 1381-1383"])(1943-60)[Harper & Brothers Publishers]. https://collections.library.yale.edu/catalog/2005263.