MLA

Kissinger, Henry, 1923-2023. Bloemer, Klaus. Box 9, folder 8. 1964-1966. https://collections.library.yale.edu/catalog/11782431.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 9, folder 8"])(1964-1966)[Bloemer, Klaus]. https://collections.library.yale.edu/catalog/11782431.