Knight, K. G., & Norman, F. (1964). Hauptmann: Centenary lectures / ed. by K. G. Knight and F. Norman. Institute of Germanic Studies.
Lua i Stíl Chicago (17ú heag.)Knight, Kenneth Graham, agus Frederick Norman. Hauptmann: Centenary Lectures / Ed. by K. G. Knight and F. Norman. London: Institute of Germanic Studies, 1964.
Lua MLA (8ú heag.)Knight, Kenneth Graham, agus Frederick Norman. Hauptmann: Centenary Lectures / Ed. by K. G. Knight and F. Norman. Institute of Germanic Studies, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.