MLA

Thomson, Virgil, 1896-1989. Dlugoszewski, Lucia. Box 29/36, folder 4. 1959-1976. https://collections.library.yale.edu/catalog/32232250.

APA, 6th edition

Thomson, Virgil, 1896-1989. (["Box 29/36, folder 4"])(1959-1976)[Dlugoszewski, Lucia]. https://collections.library.yale.edu/catalog/32232250.