Cite

1st, 1920 Apr 30-Jun 15. Flyer

MLA

Dreier, Katherine S. (Katherine Sophie), 1877-1952. 1st, 1920 Apr 30-Jun 15. Flyer. Box 87, folder 2233. [1920]. https://collections.library.yale.edu/catalog/2014473.

APA, 6th edition

Dreier, Katherine S. (Katherine Sophie), 1877-1952. (["Box 87, folder 2233"])([1920])[1st, 1920 Apr 30-Jun 15. Flyer]. https://collections.library.yale.edu/catalog/2014473.