MLA

Brodsky, Joseph, 1940-1996. English translation by George Kline and Brodsky, drafts and printed version. Box 57, folder 1107-1111. 1985-1987, undated. https://collections.library.yale.edu/catalog/11702321.

APA, 6th edition

Brodsky, Joseph, 1940-1996. (["Box 57, folder 1107-1111"])(1985-1987, undated)[English translation by George Kline and Brodsky, drafts and printed version]. https://collections.library.yale.edu/catalog/11702321.