MLA

Carson, Rachel, 1907-1964. "3rd draft": typescript, corrected. Box 1, folder 4. n.d.. https://collections.library.yale.edu/catalog/17410645.

APA, 6th edition

Carson, Rachel, 1907-1964. (["Box 1, folder 4"])(n.d.)["3rd draft": typescript, corrected]. https://collections.library.yale.edu/catalog/17410645.