MLA

Lindbergh, Charles A. (Charles Augustus), 1902-1974. Portrait with Elizabeth Cutter Morrow. 22, folder 9. 1927. https://collections.library.yale.edu/catalog/10011569.

APA, 6th edition

Lindbergh, Charles A. (Charles Augustus), 1902-1974. (["22, folder 9"])(1927)[Portrait with Elizabeth Cutter Morrow]. https://collections.library.yale.edu/catalog/10011569.