MLA

Carson, Rachel, 1907-1964. Illustrations. Box 26 (Oversize), folder 465-72. n.d.. https://collections.library.yale.edu/catalog/2018358.

APA, 6th edition

Carson, Rachel, 1907-1964. (["Box 26 (Oversize), folder 465-72"])(n.d.)[Illustrations]. https://collections.library.yale.edu/catalog/2018358.