MLA

Gregory, Alyse, 1882-1967. Randolph Bourne: Life and Selected Letters (draft), typescript, corrected. Box 60, folder 1009-1011. n.d.. https://collections.library.yale.edu/catalog/17072597.

APA, 6th edition

Gregory, Alyse, 1882-1967. (["Box 60, folder 1009-1011"])(n.d.)[Randolph Bourne: Life and Selected Letters (draft), typescript, corrected]. https://collections.library.yale.edu/catalog/17072597.