MLA

Saarinen, Eero, 1910-1961. Exteriors. Box 329, folder 920. 1962, undated. https://collections.library.yale.edu/catalog/10017482.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 329, folder 920"])(1962, undated)[Exteriors]. https://collections.library.yale.edu/catalog/10017482.