MLA

Hulme, Kathryn, 1900-1981. Forward to the German translation. Box 5, folder 89. 1967. https://collections.library.yale.edu/catalog/17060819.

APA, 6th edition

Hulme, Kathryn, 1900-1981. (["Box 5, folder 89"])(1967)[Forward to the German translation]. https://collections.library.yale.edu/catalog/17060819.