MLA

Steinberg, Saul, 1914-1999. Papademetriou, Tessa Namuth. Box 36, folder 660. 1965 April 12–1965 December 15. https://collections.library.yale.edu/catalog/10034220.

APA, 6th edition

Steinberg, Saul, 1914-1999. (["Box 36, folder 660"])(1965 April 12–1965 December 15)[Papademetriou, Tessa Namuth]. https://collections.library.yale.edu/catalog/10034220.