Knight, K. G., & Norman, F. (1964). Hauptmann: Centenary lectures / ed. by K. G. Knight and F. Norman. Institute of Germanic Studies.

Knight, Kenneth Graham, and Frederick Norman. Hauptmann: Centenary Lectures / Ed. by K. G. Knight and F. Norman. London: Institute of Germanic Studies, 1964.

Knight, Kenneth Graham, and Frederick Norman. Hauptmann: Centenary Lectures / Ed. by K. G. Knight and F. Norman. Institute of Germanic Studies, 1964.