MLA

Lindbergh, Charles A. (Charles Augustus), 1902-1974. Bowles, Chester. Box 5, folder 129. 1941. https://collections.library.yale.edu/catalog/10013899.

APA, 6th edition

Lindbergh, Charles A. (Charles Augustus), 1902-1974. (["Box 5, folder 129"])(1941)[Bowles, Chester]. https://collections.library.yale.edu/catalog/10013899.