MLA

Meredith, George, 1828-1909. Modern Love. Box 9, folder 17. 1898. https://collections.library.yale.edu/catalog/30996144.

APA, 6th edition

Meredith, George, 1828-1909. (["Box 9, folder 17"])(1898)[Modern Love]. https://collections.library.yale.edu/catalog/30996144.