MLA

Shapiro, Harvey, 1924-2013. Updike, John. Box 2, folder 112. 1983, undated. https://collections.library.yale.edu/catalog/17218168.

APA, 6th edition

Shapiro, Harvey, 1924-2013. (["Box 2, folder 112"])(1983, undated)[Updike, John]. https://collections.library.yale.edu/catalog/17218168.