MLA

Hughes, Langston, 1902-1967. USSR, Tashkent, Uzbekistan. Box 459, folder 11111. 1929, n.d.. https://collections.library.yale.edu/catalog/2018724.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 459, folder 11111"])(1929, n.d.)[USSR, Tashkent, Uzbekistan]. https://collections.library.yale.edu/catalog/2018724.