MLA

Stein, Gertrude, 1874-1946. Printed version, clipping from Vanity Fair. Box 2, folder 56. 1934 Sep. https://collections.library.yale.edu/catalog/17105697.

APA, 6th edition

Stein, Gertrude, 1874-1946. (["Box 2, folder 56"])(1934 Sep)[Printed version, clipping from Vanity Fair]. https://collections.library.yale.edu/catalog/17105697.