MLA

Freeman, Walter, 1895-1972. 1151. Midnight concert. 3, folder 94. 1912-1916. https://collections.library.yale.edu/catalog/10010982.

APA, 6th edition

Freeman, Walter, 1895-1972. (["3, folder 94"])(1912-1916)[1151. Midnight concert]. https://collections.library.yale.edu/catalog/10010982.