MLA

Acton, Harold, 1904-1994. Act IL. Reunion. Box 2, folder 125-126. 1933 1941. https://collections.library.yale.edu/catalog/16604597.

APA, 6th edition

Acton, Harold, 1904-1994. (["Box 2, folder 125-126"])(1933 1941)[Act IL. Reunion]. https://collections.library.yale.edu/catalog/16604597.