MLA

Roraback, Catherine, 1920-2007. Roraback, Catherine. Box 8, folder 88. 1969–1971. https://collections.library.yale.edu/catalog/17411853.

APA, 6th edition

Roraback, Catherine, 1920-2007. (["Box 8, folder 88"])(1969–1971)[Roraback, Catherine]. https://collections.library.yale.edu/catalog/17411853.