MLA

Koch, Frederick R. (Frederick Robinson). Music/Talitha Kumi. Box 240, folder 1582. 1898 Oct 9-26. https://collections.library.yale.edu/catalog/2043648.

APA, 6th edition

Koch, Frederick R. (Frederick Robinson). (["Box 240, folder 1582"])(1898 Oct 9-26)[Music/Talitha Kumi]. https://collections.library.yale.edu/catalog/2043648.