MLA

Carson, Rachel, 1907-1964. Tarzwell, Clarence. Box 44, folder 831. 1959-62. https://collections.library.yale.edu/catalog/17145179.

APA, 6th edition

Carson, Rachel, 1907-1964. (["Box 44, folder 831"])(1959-62)[Tarzwell, Clarence]. https://collections.library.yale.edu/catalog/17145179.