MLA

Brodsky, Joseph, 1940-1996. Series II -- Writings -- Poetry -- Individual Poems -- Ekloga V-ia: Letnaia, English translation by George Kline and Brodsky. Box 198, folder 4304. 1985-1987, undated. https://collections.library.yale.edu/catalog/11702344.

APA, 6th edition

Brodsky, Joseph, 1940-1996. (["Box 198, folder 4304"])(1985-1987, undated)[Series II -- Writings -- Poetry -- Individual Poems -- Ekloga V-ia: Letnaia, English translation by George Kline and Brodsky]. https://collections.library.yale.edu/catalog/11702344.