MLA

Luhan, Mabel Dodge, 1879-1962. Luhan, Tony. Box 65, folder 1764-1765. 1946-49, n.d.. https://collections.library.yale.edu/catalog/10268279.

APA, 6th edition

Luhan, Mabel Dodge, 1879-1962. (["Box 65, folder 1764-1765"])(1946-49, n.d.)[Luhan, Tony]. https://collections.library.yale.edu/catalog/10268279.