Chapter III: holograph and typescript, corrected, with carbons
MLA
Carson, Rachel, 1907-1964. Chapter III: holograph and typescript, corrected, with carbons. Box 50, folder 903-11. n.d.. https://collections.library.yale.edu/catalog/10513967.
APA, 6th edition
Carson, Rachel, 1907-1964. (["Box 50, folder 903-11"])(n.d.)[Chapter III: holograph and typescript, corrected, with carbons]. https://collections.library.yale.edu/catalog/10513967.