MLA

Hulme, Kathryn, 1900-1981. Hawaii. Box 52, folder 721. n.d.. https://collections.library.yale.edu/catalog/32476372.

APA, 6th edition

Hulme, Kathryn, 1900-1981. (["Box 52, folder 721"])(n.d.)[Hawaii]. https://collections.library.yale.edu/catalog/32476372.