MLA

Vance, Cyrus R. (Cyrus Roberts), 1917-2002. Background materials, proposals, and notes [includes: reports on United States interests in Cyprus, Greece, and Turkey]. Box 1, folder 4. 1967. https://collections.library.yale.edu/catalog/10012777.

APA, 6th edition

Vance, Cyrus R. (Cyrus Roberts), 1917-2002. (["Box 1, folder 4"])(1967)[Background materials, proposals, and notes [includes: reports on United States interests in Cyprus, Greece, and Turkey]]. https://collections.library.yale.edu/catalog/10012777.