MLA

Saarinen, Eero, 1910-1961. Exteriors; interiors. Box 331, folder 949. 1960, undated. https://collections.library.yale.edu/catalog/10017335.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 331, folder 949"])(1960, undated)[Exteriors; interiors]. https://collections.library.yale.edu/catalog/10017335.