MLA

Schutz, Alfred, 1899-1959. Correspondence. Box 27, folder 667. 1952-53. https://collections.library.yale.edu/catalog/17301763.

APA, 6th edition

Schutz, Alfred, 1899-1959. (["Box 27, folder 667"])(1952-53)[Correspondence]. https://collections.library.yale.edu/catalog/17301763.