MLA

Saarinen, Eero, 1910-1961. Miscellaneous. Box 672, folder 19. 1959, 1962. https://collections.library.yale.edu/catalog/10017448.

APA, 6th edition

Saarinen, Eero, 1910-1961. (["Box 672, folder 19"])(1959, 1962)[Miscellaneous]. https://collections.library.yale.edu/catalog/10017448.