MLA

Van Vechten, Carl, 1880-1964. [F. Scott Fitzgerald]. v. 12a Fitzgerald - Frohman. [1937 June 4]. https://collections.library.yale.edu/catalog/2034620.

APA, 6th edition

Van Vechten, Carl, 1880-1964. (["v. 12a Fitzgerald - Frohman"])([1937 June 4])[[F. Scott Fitzgerald]]. https://collections.library.yale.edu/catalog/2034620.