MLA

Corn, Alfred, 1943-. Updike, John. Box 4. 1988-1989. https://collections.library.yale.edu/catalog/17218070.

APA, 6th edition

Corn, Alfred, 1943-. (["Box 4"])(1988-1989)[Updike, John]. https://collections.library.yale.edu/catalog/17218070.