De Bit, R. M. (1923). A textbook of the sacred science: The philosophy and metaphysics for the School of the Sacred Science, founded 1922. School of the Sacred Science.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDe Bit, Ralph M. A Textbook of the Sacred Science: The Philosophy and Metaphysics for the School of the Sacred Science, Founded 1922. Los Angeles, Calif: School of the Sacred Science, 1923.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDe Bit, Ralph M. A Textbook of the Sacred Science: The Philosophy and Metaphysics for the School of the Sacred Science, Founded 1922. School of the Sacred Science, 1923.
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