MLA

Hovhaness, Alan, 1911-2000. Carbon copies of typed transcripts of Hovhaness letters with annotations in Malina's hand. Box 1, folder 13. 1953-58, undated. https://collections.library.yale.edu/catalog/17167340.

APA, 6th edition

Hovhaness, Alan, 1911-2000. (["Box 1, folder 13"])(1953-58, undated)[Carbon copies of typed transcripts of Hovhaness letters with annotations in Malina's hand]. https://collections.library.yale.edu/catalog/17167340.