MLA

Koch, Frederick R. (Frederick Robinson). Music/Parade. Box 195, folder 1537. [1917]. https://collections.library.yale.edu/catalog/10508450.

APA, 6th edition

Koch, Frederick R. (Frederick Robinson). (["Box 195, folder 1537"])([1917])[Music/Parade]. https://collections.library.yale.edu/catalog/10508450.