MLA

Stenzel, Franz (1906-1998). Barchus, Eliza. Box 13, folder 289. 1905-74, n.d.. https://collections.library.yale.edu/catalog/17266042.

APA, 6th edition

Stenzel, Franz (1906-1998). (["Box 13, folder 289"])(1905-74, n.d.)[Barchus, Eliza]. https://collections.library.yale.edu/catalog/17266042.