Engelstein, S., & Niekerk, C. Introduction: Violence, Culture, Aesthetics: Germany 1789-1938 / Stefani Engelstein. Carl Niekerk. Contemplating violence : critical studies in modern German culture.(2011).
Lua i Stíl Chicago (17ú heag.)Engelstein, Stefani, agus Carl Niekerk. "Introduction: Violence, Culture, Aesthetics: Germany 1789-1938 / Stefani Engelstein. Carl Niekerk." Contemplating Violence : Critical Studies in Modern German Culture.(2011) .
Lua MLA (8ú heag.)Engelstein, Stefani, agus Carl Niekerk. "Introduction: Violence, Culture, Aesthetics: Germany 1789-1938 / Stefani Engelstein. Carl Niekerk." Contemplating Violence : Critical Studies in Modern German Culture.(2011), .
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