CHRISTIAN, J. L. (1973). Philosophy: An introduction to the art of wondering. Rinehart Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCHRISTIAN, James L. Philosophy: An Introduction to the Art of Wondering. San Francisco: Rinehart Press, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCHRISTIAN, James L. Philosophy: An Introduction to the Art of Wondering. Rinehart Press, 1973.
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