MLA

Winslow, C.-E. A. (Charles-Edward Amory), 1877-1957. Winslow with Executive Committee and senior staff, Committee on the Costs of Medical Care: print. Box 134, folder 84. Circa 1930-1931. https://collections.library.yale.edu/catalog/10016069.

APA, 6th edition

Winslow, C.-E. A. (Charles-Edward Amory), 1877-1957. (["Box 134, folder 84"])(Circa 1930-1931)[Winslow with Executive Committee and senior staff, Committee on the Costs of Medical Care: print]. https://collections.library.yale.edu/catalog/10016069.