MLA

Acton, Harold, 1904-1994. Act XXXIII. Assassination of the Rebel. Box 2, folder 106. 1933 1941. https://collections.library.yale.edu/catalog/16604578.

APA, 6th edition

Acton, Harold, 1904-1994. (["Box 2, folder 106"])(1933 1941)[Act XXXIII. Assassination of the Rebel]. https://collections.library.yale.edu/catalog/16604578.