MLA

Bryher, 1894-1983. Notes. Box 168, folder 5628. n.d.. https://collections.library.yale.edu/catalog/10190006.

APA, 6th edition

Bryher, 1894-1983. (["Box 168, folder 5628"])(n.d.)[Notes]. https://collections.library.yale.edu/catalog/10190006.