MLA

Stein, Gertrude, 1874-1946. Van Vechten, Carl. Box 172, folder 4357. 1934 Apr 16. https://collections.library.yale.edu/catalog/2020760.

APA, 6th edition

Stein, Gertrude, 1874-1946. (["Box 172, folder 4357"])(1934 Apr 16)[Van Vechten, Carl]. https://collections.library.yale.edu/catalog/2020760.