MLA

Wolff, Helen, 1906-1994. Publicity. Box 47, folder 1492. [1913?]. https://collections.library.yale.edu/catalog/31907657.

APA, 6th edition

Wolff, Helen, 1906-1994. (["Box 47, folder 1492"])([1913?])[Publicity]. https://collections.library.yale.edu/catalog/31907657.