MLA

Koch, Frederick R. (Frederick Robinson). Music/Apothicaire et perruquier. Box 162, folder 1504. n.d.. https://collections.library.yale.edu/catalog/2018741.

APA, 6th edition

Koch, Frederick R. (Frederick Robinson). (["Box 162, folder 1504"])(n.d.)[Music/Apothicaire et perruquier]. https://collections.library.yale.edu/catalog/2018741.