MLA

Acton, Harold, 1904-1994. Act XXVII. Rating the Rebel. Box 2, folder 100. 1933 1941. https://collections.library.yale.edu/catalog/16604572.

APA, 6th edition

Acton, Harold, 1904-1994. (["Box 2, folder 100"])(1933 1941)[Act XXVII. Rating the Rebel]. https://collections.library.yale.edu/catalog/16604572.