MLA

Saarinen, Eero, 1910-1961. Dedication; exteriors. Box 221, folder 716. 1958, undated. https://collections.library.yale.edu/catalog/10017091.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 221, folder 716"])(1958, undated)[Dedication; exteriors]. https://collections.library.yale.edu/catalog/10017091.