MLA

Van Vechten, Carl, 1880-1964. Roll Number Yy. Box 567, folder 10536. 1932 August 5-6. https://collections.library.yale.edu/catalog/32332057.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 567, folder 10536"])(1932 August 5-6)[Roll Number Yy]. https://collections.library.yale.edu/catalog/32332057.