MLA

Carson, Rachel, 1907-1964. "The Edge of the Sea": typescript. Box 99, folder 1827. n.d.. https://collections.library.yale.edu/catalog/17145199.

APA, 6th edition

Carson, Rachel, 1907-1964. (["Box 99, folder 1827"])(n.d.)["The Edge of the Sea": typescript]. https://collections.library.yale.edu/catalog/17145199.