Cite

Penn, Irving (in Series XII)

MLA

Hughes, Langston, 1902-1967. Penn, Irving (in Series XII). Box 633, folder 14216. 1947. https://collections.library.yale.edu/catalog/32407211.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 633, folder 14216"])(1947)[Penn, Irving (in Series XII)]. https://collections.library.yale.edu/catalog/32407211.