Lua APA (7ú heag.)
Weisshampel, S. (2008). The role of science fiction: Asimov & Vonnegut : a comparison. Diplom.de.
Lua i Stíl Chicago (17ú heag.)
Weisshampel, Stefan. The Role of Science Fiction: Asimov & Vonnegut : A Comparison. Hamburg: Diplom.de, 2008.
Lua MLA (9ú heag.)
Weisshampel, Stefan. The Role of Science Fiction: Asimov & Vonnegut : A Comparison. Diplom.de, 2008.
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