Cite

Early version: parts for trebles 1-4

MLA

Koch, Frederick R. (Frederick Robinson). Early version: parts for trebles 1-4. Box 59, folder 1362. n.d.. https://collections.library.yale.edu/catalog/2077423.

APA, 6th edition

Koch, Frederick R. (Frederick Robinson). (["Box 59, folder 1362"])(n.d.)[Early version: parts for trebles 1-4]. https://collections.library.yale.edu/catalog/2077423.