MLA

Kissinger, Henry, 1923-2023. Memorandum of conversation with Klaus Ritter and Hans Speidel, May 25, 1964. Box 252, folder 15. 1964 May-June. https://collections.library.yale.edu/catalog/11786590.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 252, folder 15"])(1964 May-June)[Memorandum of conversation with Klaus Ritter and Hans Speidel, May 25, 1964]. https://collections.library.yale.edu/catalog/11786590.