MLA

Serge, Victor, 1890-1947. "D'un pouvoir fort," typescript, corrected. Box 4, folder 208. 1937 Jan 2. https://collections.library.yale.edu/catalog/16495462.

APA, 6th edition

Serge, Victor, 1890-1947. (["Box 4, folder 208"])(1937 Jan 2)["D'un pouvoir fort," typescript, corrected]. https://collections.library.yale.edu/catalog/16495462.