MLA

Van Vechten, Carl, 1880-1964. Schuyler, George S. (George Samuel). Box 223. 1941 July 2. https://collections.library.yale.edu/catalog/2018386.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["Box 223"])(1941 July 2)[Schuyler, George S. (George Samuel)]. https://collections.library.yale.edu/catalog/2018386.