MLA

Wilson, Edmund, 1895-1972. Miller, Anne. Box 46, folder 1256-1258. 1969-72, n.d.. https://collections.library.yale.edu/catalog/17083228.

APA, 6th edition

Wilson, Edmund, 1895-1972. (["Box 46, folder 1256-1258"])(1969-72, n.d.)[Miller, Anne]. https://collections.library.yale.edu/catalog/17083228.