MLA

Kissinger, Henry, 1923-2023. Humanities 2: The Novel. Box 68, folder 10. 1950 spring. https://collections.library.yale.edu/catalog/11783716.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 68, folder 10"])(1950 spring)[Humanities 2: The Novel]. https://collections.library.yale.edu/catalog/11783716.