MLA

Lindbergh, Charles A. (Charles Augustus), 1902-1974. Barnstorming. Box 3, folder 27. Circa 1925. https://collections.library.yale.edu/catalog/10013304.

APA, 6th edition

Lindbergh, Charles A. (Charles Augustus), 1902-1974. (["Box 3, folder 27"])(Circa 1925)[Barnstorming]. https://collections.library.yale.edu/catalog/10013304.