Coryn, M. S.
MLA
Butts, Mary, 1890-1937. Coryn, M. S.. Box 1, folder 17. 1933 Nov 26. https://collections.library.yale.edu/catalog/16893644.
APA, 6th edition
Butts, Mary, 1890-1937. (["Box 1, folder 17"])(1933 Nov 26)[Coryn, M. S.]. https://collections.library.yale.edu/catalog/16893644.