MLA

Brodsky, Joseph, 1940-1996. The Emperor, drafts. Box 57 | 1122-1123. 1995, undated. https://collections.library.yale.edu/catalog/17306032.

APA, 6th edition

Brodsky, Joseph, 1940-1996. (["Box 57 | 1122-1123"])(1995, undated)[The Emperor, drafts]. https://collections.library.yale.edu/catalog/17306032.