Yes is For A Very Young Man, Interplayers (some photographs by Carl Van Vechten)
MLA
Stein, Gertrude, 1874-1946. Yes is For A Very Young Man, Interplayers (some photographs by Carl Van Vechten). Box 20, folder 343. 1951. https://collections.library.yale.edu/catalog/16721033.
APA, 6th edition
Stein, Gertrude, 1874-1946. (["Box 20, folder 343"])(1951)[Yes is For A Very Young Man, Interplayers (some photographs by Carl Van Vechten)]. https://collections.library.yale.edu/catalog/16721033.