MLA

Dreier, Katherine S. (Katherine Sophie), 1877-1952. Scheiber, Hugo. Box 31, folder 911. 1927. https://collections.library.yale.edu/catalog/11255922.

APA, 6th edition

Dreier, Katherine S. (Katherine Sophie), 1877-1952. (["Box 31, folder 911"])(1927)[Scheiber, Hugo]. https://collections.library.yale.edu/catalog/11255922.