MLA

Bryher, 1894-1983. Allégret, Marc. Box 169, folder 5658. 1927-28. https://collections.library.yale.edu/catalog/10172239.

APA, 6th edition

Bryher, 1894-1983. (["Box 169, folder 5658"])(1927-28)[Allégret, Marc]. https://collections.library.yale.edu/catalog/10172239.