MLA

Saarinen, Eero, 1910-1961. Airports, general. Box 460, folder 1288. Circa 1960. https://collections.library.yale.edu/catalog/10172254.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 460, folder 1288"])(Circa 1960)[Airports, general]. https://collections.library.yale.edu/catalog/10172254.