MLA

Hulme, Kathryn, 1900-1981. Solano, Solita. Box 19, folder 484-93. 1951-75, n.d.. https://collections.library.yale.edu/catalog/17060833.

APA, 6th edition

Hulme, Kathryn, 1900-1981. (["Box 19, folder 484-93"])(1951-75, n.d.)[Solano, Solita]. https://collections.library.yale.edu/catalog/17060833.