MLA

Berberova, N. (Nina), 1901-1993. Bennett, Virginia. Box 4, folder 59. 1967-76, n.d.. https://collections.library.yale.edu/catalog/32324388.

APA, 6th edition

Berberova, N. (Nina), 1901-1993. (["Box 4, folder 59"])(1967-76, n.d.)[Bennett, Virginia]. https://collections.library.yale.edu/catalog/32324388.