MLA

Wilson, Edmund, 1895-1972. Correspondence. Box 145, folder 3263. 1965-68, n.d.. https://collections.library.yale.edu/catalog/11863776.

APA, 6th edition

Wilson, Edmund, 1895-1972. (["Box 145, folder 3263"])(1965-68, n.d.)[Correspondence]. https://collections.library.yale.edu/catalog/11863776.