Cite

Music/Sinfonia concertante, piano, orchestra, original version

MLA

Koch, Frederick R. (Frederick Robinson). Music/Sinfonia concertante, piano, orchestra, original version. Box 217, folder 1559. [1927]. https://collections.library.yale.edu/catalog/2005187.

APA, 6th edition

Koch, Frederick R. (Frederick Robinson). (["Box 217, folder 1559"])([1927])[Music/Sinfonia concertante, piano, orchestra, original version]. https://collections.library.yale.edu/catalog/2005187.