MLA

Wilson, Edmund, 1895-1972. Nin, Anais. Box 201, folder 4916. n.d.. https://collections.library.yale.edu/catalog/2008071.

APA, 6th edition

Wilson, Edmund, 1895-1972. (["Box 201, folder 4916"])(n.d.)[Nin, Anais]. https://collections.library.yale.edu/catalog/2008071.