MLA

Carson, Rachel, 1907-1964. "2nd draft": typescript, corrected. Box 1, folder 3. n.d.. https://collections.library.yale.edu/catalog/17410644.

APA, 6th edition

Carson, Rachel, 1907-1964. (["Box 1, folder 3"])(n.d.)["2nd draft": typescript, corrected]. https://collections.library.yale.edu/catalog/17410644.