Randall, L. (2011). Knocking on heaven's door: How physics and scientific thinking illuminate the universe and the modern world. Ecco.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRandall, Lisa. Knocking on Heaven's Door: How Physics and Scientific Thinking Illuminate the Universe and the Modern World. New York: Ecco, 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRandall, Lisa. Knocking on Heaven's Door: How Physics and Scientific Thinking Illuminate the Universe and the Modern World. Ecco, 2011.
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