Music/Turandot
MLA
Koch, Frederick R. (Frederick Robinson). Music/Turandot. Box 331, folder 1880. n.d.. https://collections.library.yale.edu/catalog/11705450.
APA, 6th edition
Koch, Frederick R. (Frederick Robinson). (["Box 331, folder 1880"])(n.d.)[Music/Turandot]. https://collections.library.yale.edu/catalog/11705450.