MLA

Kissinger, Henry, 1923-2023. Chemistry notes. Box 66, folder 16. Circa 1947-circa 1950. https://collections.library.yale.edu/catalog/11783689.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 66, folder 16"])(Circa 1947-circa 1950)[Chemistry notes]. https://collections.library.yale.edu/catalog/11783689.