MLA

Lmanian, Alexander, 1925-1996. Unidentified. Box 1, folder 8. 1968 April 28. https://collections.library.yale.edu/catalog/2042880.

APA, 6th edition

Lmanian, Alexander, 1925-1996. (["Box 1, folder 8"])(1968 April 28)[Unidentified]. https://collections.library.yale.edu/catalog/2042880.