MLA

Brodsky, Joseph, 1940-1996. Series II -- Writings -- Poetry -- Individual Poems -- Oblaka, English translation by Brodsky. Box 195, folder 4265. 1989-1995. https://collections.library.yale.edu/catalog/11702339.

APA, 6th edition

Brodsky, Joseph, 1940-1996. (["Box 195, folder 4265"])(1989-1995)[Series II -- Writings -- Poetry -- Individual Poems -- Oblaka, English translation by Brodsky]. https://collections.library.yale.edu/catalog/11702339.