MLA

Stein, Gertrude, 1874-1946. [Excerpts of his works with military comments on the suitability of his work for enlisted men]. Box 94, folder 1751. 1945. https://collections.library.yale.edu/catalog/12155843.

APA, 6th edition

Stein, Gertrude, 1874-1946. (["Box 94, folder 1751"])(1945)[[Excerpts of his works with military comments on the suitability of his work for enlisted men]]. https://collections.library.yale.edu/catalog/12155843.