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शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रebrary, Inc, Arto Salomaa, Derick Wood, और Sheng Yu. A Half-century of Automata Theory: Celebration and Inspiration. River Edge, N.J.: World Scientific, 2001.
एमएलए (9वां संस्करण) प्रशस्ति पत्रebrary, Inc, et al. A Half-century of Automata Theory: Celebration and Inspiration. World Scientific, 2001.
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