MLA

Stein, Gertrude, 1874-1946. Printed pamphlet. Box 10, folder 219. 1937. https://collections.library.yale.edu/catalog/17105701.

APA, 6th edition

Stein, Gertrude, 1874-1946. (["Box 10, folder 219"])(1937)[Printed pamphlet]. https://collections.library.yale.edu/catalog/17105701.