APA (7 वां संस्करण) प्रशस्ति पत्र
Erkenbrecher, C. (2011). The "Hitchhiker's guide to the galaxy" revisited: Motifs of science fiction and social criticism. Diplomica Verlag.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Erkenbrecher, Christian. The "Hitchhiker's Guide to the Galaxy" Revisited: Motifs of Science Fiction and Social Criticism. Hamburg: Diplomica Verlag, 2011.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Erkenbrecher, Christian. The "Hitchhiker's Guide to the Galaxy" Revisited: Motifs of Science Fiction and Social Criticism. Diplomica Verlag, 2011.
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