MLA

Brodsky, Joseph, 1940-1996. [Correspondence from Tomas Venclova to Joseph Brodsky]. Box 15 | Folder 414. 1972-1976. https://collections.library.yale.edu/catalog/10000482.

APA, 6th edition

Brodsky, Joseph, 1940-1996. (["Box 15 | Folder 414"])(1972-1976)[[Correspondence from Tomas Venclova to Joseph Brodsky]]. https://collections.library.yale.edu/catalog/10000482.