MLA

Brodsky, Joseph, 1940-1996. Russian version, drafts. Box 60, folder 1262-1263. [1991]. https://collections.library.yale.edu/catalog/2055568.

APA, 6th edition

Brodsky, Joseph, 1940-1996. (["Box 60, folder 1262-1263"])([1991])[Russian version, drafts]. https://collections.library.yale.edu/catalog/2055568.