MLA

Lindbergh, Charles A. (Charles Augustus), 1902-1974. Illiec, France. Box 43, folder 15. Circa 1938. https://collections.library.yale.edu/catalog/10014784.

APA, 6th edition

Lindbergh, Charles A. (Charles Augustus), 1902-1974. (["Box 43, folder 15"])(Circa 1938)[Illiec, France]. https://collections.library.yale.edu/catalog/10014784.