MLA

West, Rebecca, 1892-1983. Woolf, Virginia. Box 22, folder 1027. 1931, n.d.. https://collections.library.yale.edu/catalog/16479170.

APA, 6th edition

West, Rebecca, 1892-1983. (["Box 22, folder 1027"])(1931, n.d.)[Woolf, Virginia]. https://collections.library.yale.edu/catalog/16479170.