Cite

----, Lucien

MLA

McKay, Claude, 1890-1948. ----, Lucien. Box 7, folder 239. n.d.. https://collections.library.yale.edu/catalog/32180864.

APA, 6th edition

McKay, Claude, 1890-1948. (["Box 7, folder 239"])(n.d.)[----, Lucien]. https://collections.library.yale.edu/catalog/32180864.