MLA

Dreier, Katherine S. (Katherine Sophie), 1877-1952. Raymond, Antonin. Box 30, folder 869. 1939. https://collections.library.yale.edu/catalog/17047949.

APA, 6th edition

Dreier, Katherine S. (Katherine Sophie), 1877-1952. (["Box 30, folder 869"])(1939)[Raymond, Antonin]. https://collections.library.yale.edu/catalog/17047949.