MLA

Berberova, N. (Nina), 1901-1993. Brodsky, Joseph. Box 5, folder 87. 1972. https://collections.library.yale.edu/catalog/16687987.

APA, 6th edition

Berberova, N. (Nina), 1901-1993. (["Box 5, folder 87"])(1972)[Brodsky, Joseph]. https://collections.library.yale.edu/catalog/16687987.