Cite

Schwitters, Helma

MLA

Dreier, Katherine S. (Katherine Sophie), 1877-1952. Schwitters, Helma. Box 31, folder 923-924. 1926-37. https://collections.library.yale.edu/catalog/16694425.

APA, 6th edition

Dreier, Katherine S. (Katherine Sophie), 1877-1952. (["Box 31, folder 923-924"])(1926-37)[Schwitters, Helma]. https://collections.library.yale.edu/catalog/16694425.