MLA

Lees-Milne, James, 1908-1997. Extended family. Box 27, folder 1008. 1930-[ca. 1950s]. https://collections.library.yale.edu/catalog/2007164.

APA, 6th edition

Lees-Milne, James, 1908-1997. (["Box 27, folder 1008"])(1930-[ca. 1950s])[Extended family]. https://collections.library.yale.edu/catalog/2007164.