MLA

Lindbergh, Charles A. (Charles Augustus), 1902-1974. Receiving honorary degree from Amherst College. 22, folder 24. 1939. https://collections.library.yale.edu/catalog/10016179.

APA, 6th edition

Lindbergh, Charles A. (Charles Augustus), 1902-1974. (["22, folder 24"])(1939)[Receiving honorary degree from Amherst College]. https://collections.library.yale.edu/catalog/10016179.