Cite

"Der Mensch im technischen Zeitalter": lecture, holograph and typescript, carbon

MLA

Stepun, Fedor, 1884-1965. "Der Mensch im technischen Zeitalter": lecture, holograph and typescript, carbon. Box 53, folder 1633. n.d.. https://collections.library.yale.edu/catalog/16495068.

APA, 6th edition

Stepun, Fedor, 1884-1965. (["Box 53, folder 1633"])(n.d.)["Der Mensch im technischen Zeitalter": lecture, holograph and typescript, carbon]. https://collections.library.yale.edu/catalog/16495068.