MLA

Lindbergh, Anne Morrow, 1906-2001. Guggenheim, Harry F.. Box 7, folder 149. 1934-1965. https://collections.library.yale.edu/catalog/10016111.

APA, 6th edition

Lindbergh, Anne Morrow, 1906-2001. (["Box 7, folder 149"])(1934-1965)[Guggenheim, Harry F.]. https://collections.library.yale.edu/catalog/10016111.