MLA

Saarinen, Eero, 1910-1961. Airports reports summary. Box 460, folder 1289. Circa 1960. https://collections.library.yale.edu/catalog/10172246.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 460, folder 1289"])(Circa 1960)[Airports reports summary]. https://collections.library.yale.edu/catalog/10172246.