MLA

Roraback, Catherine, 1920-2007. Davis, Angela. Box 8, folder 87. 1971. https://collections.library.yale.edu/catalog/17411852.

APA, 6th edition

Roraback, Catherine, 1920-2007. (["Box 8, folder 87"])(1971)[Davis, Angela]. https://collections.library.yale.edu/catalog/17411852.