MLA

Wilson, Edmund, 1895-1972. Waterman, Jean. Box 70, folder 1925-1926. 1930-34, n.d.. https://collections.library.yale.edu/catalog/17083239.

APA, 6th edition

Wilson, Edmund, 1895-1972. (["Box 70, folder 1925-1926"])(1930-34, n.d.)[Waterman, Jean]. https://collections.library.yale.edu/catalog/17083239.