MLA

Lindbergh, Charles A. (Charles Augustus), 1902-1974. Lindbergh, Jon Morrow. Box 26, folder 1-15. 1932-1971. https://collections.library.yale.edu/catalog/10021416.

APA, 6th edition

Lindbergh, Charles A. (Charles Augustus), 1902-1974. (["Box 26, folder 1-15"])(1932-1971)[Lindbergh, Jon Morrow]. https://collections.library.yale.edu/catalog/10021416.