MLA

Rudge, Olga, 1895-1996. Olga Rudge alone. Box 161, folder 3739. 1897-1958, n.d.. https://collections.library.yale.edu/catalog/2003376.

APA, 6th edition

Rudge, Olga, 1895-1996. (["Box 161, folder 3739"])(1897-1958, n.d.)[Olga Rudge alone]. https://collections.library.yale.edu/catalog/2003376.