Cite

Music/Concerto, viola, orchestra: original version

MLA

Koch, Frederick R. (Frederick Robinson). Music/Concerto, viola, orchestra: original version. Box 200, folder 1542. [1929]. https://collections.library.yale.edu/catalog/2066498.

APA, 6th edition

Koch, Frederick R. (Frederick Robinson). (["Box 200, folder 1542"])([1929])[Music/Concerto, viola, orchestra: original version]. https://collections.library.yale.edu/catalog/2066498.