[Sketches on large brown envelope]
MLA
Brodsky, Joseph, 1940-1996. [Sketches on large brown envelope]. Box 133 | Folder 2985. undated. https://collections.library.yale.edu/catalog/2107226.
APA, 6th edition
Brodsky, Joseph, 1940-1996. (["Box 133 | Folder 2985"])(undated)[[Sketches on large brown envelope]]. https://collections.library.yale.edu/catalog/2107226.