MLA

Wescott, Glenway, 1901-1987. Szold-Fritz, Bernardine. Box 405, folder 4293. 1961, n.d.. https://collections.library.yale.edu/catalog/17065042.

APA, 6th edition

Wescott, Glenway, 1901-1987. (["Box 405, folder 4293"])(1961, n.d.)[Szold-Fritz, Bernardine]. https://collections.library.yale.edu/catalog/17065042.