MLA

Lindbergh, Charles A. (Charles Augustus), 1902-1974. Shetland Islands, Scotland. Box 14, folder 1. 1933 August 24-25. https://collections.library.yale.edu/catalog/10012797.

APA, 6th edition

Lindbergh, Charles A. (Charles Augustus), 1902-1974. (["Box 14, folder 1"])(1933 August 24-25)[Shetland Islands, Scotland]. https://collections.library.yale.edu/catalog/10012797.