Cite

Wilson, Helen M. K.

MLA

Wilson, Edmund, 1895-1972. Wilson, Helen M. K.. Box 200, folder 4876-4877. n.d.. https://collections.library.yale.edu/catalog/2008066.

APA, 6th edition

Wilson, Edmund, 1895-1972. (["Box 200, folder 4876-4877"])(n.d.)[Wilson, Helen M. K.]. https://collections.library.yale.edu/catalog/2008066.