Wilcock, D. (2011). The source field investigations: The hidden science and lost civilizations behind the 2012 prophecies. Brilliance Audio.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWilcock, David. The Source Field Investigations: The Hidden Science and Lost Civilizations Behind the 2012 Prophecies. Grand Haven, Mich.: Brilliance Audio, 2011.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWilcock, David. The Source Field Investigations: The Hidden Science and Lost Civilizations Behind the 2012 Prophecies. Brilliance Audio, 2011.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.