MLA

Kissinger, Henry, 1923-2023. Workbook on Problems in Foreign Policy of the United States, Staff Report for Republican Governors Association Policy Committee, Volume I [2 of 2]. Box 234, folder 1. 1968 June. https://collections.library.yale.edu/catalog/11786278.

APA, 6th edition

Kissinger, Henry, 1923-2023. (["Box 234, folder 1"])(1968 June)[Workbook on Problems in Foreign Policy of the United States, Staff Report for Republican Governors Association Policy Committee, Volume I [2 of 2]]. https://collections.library.yale.edu/catalog/11786278.