MLA

Kissinger, Henry, 1923-2023. Army General Ground School. Box 113, folder 9. 1949-1952. https://collections.library.yale.edu/catalog/11784307.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 113, folder 9"])(1949-1952)[Army General Ground School]. https://collections.library.yale.edu/catalog/11784307.