MLA

Lindbergh, Charles A. (Charles Augustus), 1902-1974. Minnesota. Box 47, folder 1-8. Circa 1900-1930s. https://collections.library.yale.edu/catalog/10013887.

APA, 6th edition

Lindbergh, Charles A. (Charles Augustus), 1902-1974. (["Box 47, folder 1-8"])(Circa 1900-1930s)[Minnesota]. https://collections.library.yale.edu/catalog/10013887.