MLA

Koch, Frederick R. (Frederick Robinson). Music/La jolie parfumeuse. Box 171, folder 1513. n.d.. https://collections.library.yale.edu/catalog/12234921.

APA, 6th edition

Koch, Frederick R. (Frederick Robinson). (["Box 171, folder 1513"])(n.d.)[Music/La jolie parfumeuse]. https://collections.library.yale.edu/catalog/12234921.