MLA

Rudge, Olga, 1895-1996. Correspondence. Box 5, folder 129-36. 1928 Mar. https://collections.library.yale.edu/catalog/11689693.

APA, 6th edition

Rudge, Olga, 1895-1996. (["Box 5, folder 129-36"])(1928 Mar)[Correspondence]. https://collections.library.yale.edu/catalog/11689693.