MLA

Henri, Robert, 1865-1929. Correspondence. Box 12, folder 313. 1890 Jun. https://collections.library.yale.edu/catalog/17029580.

APA, 6th edition

Henri, Robert, 1865-1929. (["Box 12, folder 313"])(1890 Jun)[Correspondence]. https://collections.library.yale.edu/catalog/17029580.