MLA

Lindbergh, Charles A. (Charles Augustus), 1902-1974. Receiving conservation award from William P. Rogers. Box 19, folder 13. 1969 July 11. https://collections.library.yale.edu/catalog/10013334.

APA, 6th edition

Lindbergh, Charles A. (Charles Augustus), 1902-1974. (["Box 19, folder 13"])(1969 July 11)[Receiving conservation award from William P. Rogers]. https://collections.library.yale.edu/catalog/10013334.