MLA

Broch, Hermann, 1886-1951. Untermeyer, Jean Starr and Urzidil, Johannes, interview on Hermann Broch: typescript, mimeograph. Box 60, folder 1474. n.d.. https://collections.library.yale.edu/catalog/17268023.

APA, 6th edition

Broch, Hermann, 1886-1951. (["Box 60, folder 1474"])(n.d.)[Untermeyer, Jean Starr and Urzidil, Johannes, interview on Hermann Broch: typescript, mimeograph]. https://collections.library.yale.edu/catalog/17268023.