MLA

Cunard, Nancy, 1896-1965. "Ballad of the Two Wars," typescript poem, corrected. Inscribed to Langston Hughes. Box 1, folder 32. 1937 Aug. https://collections.library.yale.edu/catalog/16538149.

APA, 6th edition

Cunard, Nancy, 1896-1965. (["Box 1, folder 32"])(1937 Aug)["Ballad of the Two Wars," typescript poem, corrected. Inscribed to Langston Hughes]. https://collections.library.yale.edu/catalog/16538149.