MLA

Fitzgerald, Robert, 1910-1985. Franklin Bibliothek. Box 12, folder 481. 1981. https://collections.library.yale.edu/catalog/17427390.

APA, 6th edition

Fitzgerald, Robert, 1910-1985. (["Box 12, folder 481"])(1981)[Franklin Bibliothek]. https://collections.library.yale.edu/catalog/17427390.