[Abstract], engraving
MLA
Hughes, Langston, 1902-1967. [Abstract], engraving. Box 584, folder 13911. n.d.. https://collections.library.yale.edu/catalog/33496095.
APA, 6th edition
Hughes, Langston, 1902-1967. (["Box 584, folder 13911"])(n.d.)[[Abstract], engraving]. https://collections.library.yale.edu/catalog/33496095.