MLA

Wilson, Edmund, 1895-1972. Houghton Mifflin Company. Box 35, folder 925. 1941-64. https://collections.library.yale.edu/catalog/17083225.

APA, 6th edition

Wilson, Edmund, 1895-1972. (["Box 35, folder 925"])(1941-64)[Houghton Mifflin Company]. https://collections.library.yale.edu/catalog/17083225.