MLA

Brodsky, Joseph, 1940-1996. Drafts. Box 73 | 1867-1869. 1989-1992, undated. https://collections.library.yale.edu/catalog/17306158.

APA, 6th edition

Brodsky, Joseph, 1940-1996. (["Box 73 | 1867-1869"])(1989-1992, undated)[Drafts]. https://collections.library.yale.edu/catalog/17306158.