Sketches, first version
MLA
Saarinen, Eero, 1910-1961. Sketches, first version. Box 346, folder 981. undated. https://collections.library.yale.edu/catalog/10017265.
APA, 6th edition
Saarinen, Eero, 1910-1961. (["Box 346, folder 981"])(undated)[Sketches, first version]. https://collections.library.yale.edu/catalog/10017265.