MLA

Berberova, N. (Nina), 1901-1993. Russica Publishers. Box 17, folder 482-483. 1980-90, n.d.. https://collections.library.yale.edu/catalog/16688025.

APA, 6th edition

Berberova, N. (Nina), 1901-1993. (["Box 17, folder 482-483"])(1980-90, n.d.)[Russica Publishers]. https://collections.library.yale.edu/catalog/16688025.