MLA

Kissinger, Henry, 1923-2023. "A Plan to Increase Private Investment in Underdeveloped Countries" by Aaron Scheinfeld. Box 186, folder 14. 1963 December. https://collections.library.yale.edu/catalog/11785575.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 186, folder 14"])(1963 December)["A Plan to Increase Private Investment in Underdeveloped Countries" by Aaron Scheinfeld]. https://collections.library.yale.edu/catalog/11785575.