MLA

Faber du Faur, Curt von, 1890-1966. Modern Language Association. Box 19, folder 154. 1948-1964. https://collections.library.yale.edu/catalog/17271160.

APA, 6th edition

Faber du Faur, Curt von, 1890-1966. (["Box 19, folder 154"])(1948-1964)[Modern Language Association]. https://collections.library.yale.edu/catalog/17271160.