MLA

Kissinger, Henry, 1923-2023. Ruebhausen, Zelia. Box 87, folder 6. 1958-1967. https://collections.library.yale.edu/catalog/11783938.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 87, folder 6"])(1958-1967)[Ruebhausen, Zelia]. https://collections.library.yale.edu/catalog/11783938.