MLA

Kissinger, Henry, 1923-2023. Foreign aid. Box 186, folder 3. 1961 June. https://collections.library.yale.edu/catalog/11785564.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 186, folder 3"])(1961 June)[Foreign aid]. https://collections.library.yale.edu/catalog/11785564.