"Memo for Mrs. Ecles on Under the Sea Wind"
MLA
Carson, Rachel, 1907-1964. "Memo for Mrs. Ecles on Under the Sea Wind". Box 3, folder 60. n.d.. https://collections.library.yale.edu/catalog/17145156.
APA, 6th edition
Carson, Rachel, 1907-1964. (["Box 3, folder 60"])(n.d.)["Memo for Mrs. Ecles on Under the Sea Wind"]. https://collections.library.yale.edu/catalog/17145156.