MLA

Kissinger, Henry, 1923-2023. Blo. Box 306, folder 6. 1970-1975. https://collections.library.yale.edu/catalog/11774584.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 306, folder 6"])(1970-1975)[Blo]. https://collections.library.yale.edu/catalog/11774584.