MLA

Kissinger, Henry, 1923-2023. "The Energy Emergency: Oil and Money, 1980," conference sponsored by International Herald Tribune and Oil Daily, London, Jun 19-20, 1980. Box 693, folder 15. 1980. https://collections.library.yale.edu/catalog/11781261.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 693, folder 15"])(1980)["The Energy Emergency: Oil and Money, 1980," conference sponsored by International Herald Tribune and Oil Daily, London, Jun 19-20, 1980]. https://collections.library.yale.edu/catalog/11781261.