MLA

Wilson, Edmund, 1895-1972. Course descriptions. Box 163, folder 4052. [1959-60]. https://collections.library.yale.edu/catalog/17083249.

APA, 6th edition

Wilson, Edmund, 1895-1972. (["Box 163, folder 4052"])([1959-60])[Course descriptions]. https://collections.library.yale.edu/catalog/17083249.