MLA

Low, David, 1891-1963. Draft B, typescript, corrected. Box 19, folder 861. ca. 1941 Mar. https://collections.library.yale.edu/catalog/16457742.

APA, 6th edition

Low, David, 1891-1963. (["Box 19, folder 861"])(ca. 1941 Mar)[Draft B, typescript, corrected]. https://collections.library.yale.edu/catalog/16457742.