MLA

Bryher, 1894-1983. Benjamin, Walter. Box 3, folder 111. 1937. https://collections.library.yale.edu/catalog/11085533.

APA, 6th edition

Bryher, 1894-1983. (["Box 3, folder 111"])(1937)[Benjamin, Walter]. https://collections.library.yale.edu/catalog/11085533.