MLA

Benson, Rita Romill, Van Vechten, Carl, 1880-1964. Benson, Martin. Box 335 | Folder 4221. 1938 April 27. https://collections.library.yale.edu/catalog/2030749.

APA, 6th edition

Benson, Rita Romill, & Van Vechten, Carl, 1880-1964. (["Box 335 | Folder 4221"])(1938 April 27)[Benson, Martin]. https://collections.library.yale.edu/catalog/2030749.