Ritchie, J. M. (1972). Gottfried Benn: The unreconstructed expressionist. Wolff.
Lua i Stíl Chicago (17ú heag.)Ritchie, J. M. Gottfried Benn: The Unreconstructed Expressionist. London: Wolff, 1972.
Lua MLA (8ú heag.)Ritchie, J. M. Gottfried Benn: The Unreconstructed Expressionist. Wolff, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.