Cite

Music/Lieder, op. 39

MLA

Koch, Frederick R. (Frederick Robinson). Music/Lieder, op. 39. Box 335, folder 1930. 1918 Dec 19. https://collections.library.yale.edu/catalog/15949723.

APA, 6th edition

Koch, Frederick R. (Frederick Robinson). (["Box 335, folder 1930"])(1918 Dec 19)[Music/Lieder, op. 39]. https://collections.library.yale.edu/catalog/15949723.