Music/Barbe-bleue
MLA
Koch, Frederick R. (Frederick Robinson). Music/Barbe-bleue. Box 328, folder 1825. n.d.. https://collections.library.yale.edu/catalog/12215021.
APA, 6th edition
Koch, Frederick R. (Frederick Robinson). (["Box 328, folder 1825"])(n.d.)[Music/Barbe-bleue]. https://collections.library.yale.edu/catalog/12215021.