MLA

Wilson, Edmund, 1895-1972. Southern, Terry. Box 63, folder 1731. 1961 Oct-Nov. https://collections.library.yale.edu/catalog/17083238.

APA, 6th edition

Wilson, Edmund, 1895-1972. (["Box 63, folder 1731"])(1961 Oct-Nov)[Southern, Terry]. https://collections.library.yale.edu/catalog/17083238.