MLA

Lindbergh, Charles A. (Charles Augustus), 1902-1974. On Naval technical mission in Garmisch, Germany. Box 17, folder 26. 1945 June 7. https://collections.library.yale.edu/catalog/10013901.

APA, 6th edition

Lindbergh, Charles A. (Charles Augustus), 1902-1974. (["Box 17, folder 26"])(1945 June 7)[On Naval technical mission in Garmisch, Germany]. https://collections.library.yale.edu/catalog/10013901.