MLA

Saarinen, Eero, 1910-1961. Room interior models. Box 82, folder 132. undated. https://collections.library.yale.edu/catalog/10017307.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 82, folder 132"])(undated)[Room interior models]. https://collections.library.yale.edu/catalog/10017307.