MLA

Hughes, Langston, 1902-1967. USSR, Chirchikstroy postcards/photos. Box 459, folder 11115. n.d.. https://collections.library.yale.edu/catalog/33223985.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 459, folder 11115"])(n.d.)[USSR, Chirchikstroy postcards/photos]. https://collections.library.yale.edu/catalog/33223985.