MLA

Venclova, Tomas, 1937-. Trauberg, Natalia. Box 5. 1978-1990, undated. https://collections.library.yale.edu/catalog/16619203.

APA, 6th edition

Venclova, Tomas, 1937-. (["Box 5"])(1978-1990, undated)[Trauberg, Natalia]. https://collections.library.yale.edu/catalog/16619203.