Cite

"20 pencil drawings bearing telephone numbers, addresses and notes"

MLA

Hughes, Langston, 1902-1967. "20 pencil drawings bearing telephone numbers, addresses and notes". Box 511, folder 12661. n.d.. https://collections.library.yale.edu/catalog/16808303.

APA, 6th edition

Hughes, Langston, 1902-1967. (["Box 511, folder 12661"])(n.d.)["20 pencil drawings bearing telephone numbers, addresses and notes"]. https://collections.library.yale.edu/catalog/16808303.