MLA

Kissinger, Henry, 1923-2023. Band-Barl. Box 305, folder 11. 1970-1973. https://collections.library.yale.edu/catalog/11774576.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 305, folder 11"])(1970-1973)[Band-Barl]. https://collections.library.yale.edu/catalog/11774576.