Vallee, J., & Aubeck, C. (2010). Wonders in the sky: Unexplained aerial objects from antiquity to modern times and their impact on human culture, history, and beliefs (1st Jeremy P. Tarcher/Penguin ed.). Jeremy P. Tarcher/Penguin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रVallee, Jacques, और Chris Aubeck. Wonders in the Sky: Unexplained Aerial Objects from Antiquity to Modern Times and Their Impact on Human Culture, History, and Beliefs. 1st Jeremy P. Tarcher/Penguin ed. New York, NY: Jeremy P. Tarcher/Penguin, 2010.
एमएलए (8वां संस्करण) प्रशस्ति पत्रVallee, Jacques, और Chris Aubeck. Wonders in the Sky: Unexplained Aerial Objects from Antiquity to Modern Times and Their Impact on Human Culture, History, and Beliefs. 1st Jeremy P. Tarcher/Penguin ed. Jeremy P. Tarcher/Penguin, 2010.
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