Tomas, D. On the imagination's horizon line: Uchronic histories, rotocybernetic contact, and Charles Babbage's calculating engines / David Tomas. From energy to information : representation in science and technology, art, and literature.(2002).
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Tomas, David. "On the Imagination's Horizon Line: Uchronic Histories, Rotocybernetic Contact, and Charles Babbage's Calculating Engines / David Tomas." From Energy to Information : Representation in Science and Technology, Art, and Literature.(2002) .
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Tomas, David. "On the Imagination's Horizon Line: Uchronic Histories, Rotocybernetic Contact, and Charles Babbage's Calculating Engines / David Tomas." From Energy to Information : Representation in Science and Technology, Art, and Literature.(2002), .