MLA

Venclova, Tomas, 1937-. Heaney, Seamus. Box 4. 1998-2002. https://collections.library.yale.edu/catalog/17297151.

APA, 6th edition

Venclova, Tomas, 1937-. (["Box 4"])(1998-2002)[Heaney, Seamus]. https://collections.library.yale.edu/catalog/17297151.