MLA

Lindbergh, Charles A. (Charles Augustus), 1902-1974. In Miami, Florida. Box 15, folder 9. 1933 December 16. https://collections.library.yale.edu/catalog/10011313.

APA, 6th edition

Lindbergh, Charles A. (Charles Augustus), 1902-1974. (["Box 15, folder 9"])(1933 December 16)[In Miami, Florida]. https://collections.library.yale.edu/catalog/10011313.