MLA

Koch, Frederick R. (Frederick Robinson). Music/Tritons. Box 340, folder 1992. 1920. https://collections.library.yale.edu/catalog/2067812.

APA, 6th edition

Koch, Frederick R. (Frederick Robinson). (["Box 340, folder 1992"])(1920)[Music/Tritons]. https://collections.library.yale.edu/catalog/2067812.