MLA

Cassirer, Ernst, 1874-1945. Draft B, typescript, corrected. Box 42, folder 826. 1937. https://collections.library.yale.edu/catalog/17274633.

APA, 6th edition

Cassirer, Ernst, 1874-1945. (["Box 42, folder 826"])(1937)[Draft B, typescript, corrected]. https://collections.library.yale.edu/catalog/17274633.