MLA

Wilson, Edmund, 1895-1972. Emerson-Thoreau Medal. Box 204, folder 4969. 1966. https://collections.library.yale.edu/catalog/2005065.

APA, 6th edition

Wilson, Edmund, 1895-1972. (["Box 204, folder 4969"])(1966)[Emerson-Thoreau Medal]. https://collections.library.yale.edu/catalog/2005065.