Mullin, R. P. (2007). The soul of classical American philosophy: The ethical and spiritual insights of William James, Josiah Royce, and Charles Sanders Peirce. State University of New York Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMullin, Richard P. The Soul of Classical American Philosophy: The Ethical and Spiritual Insights of William James, Josiah Royce, and Charles Sanders Peirce. Albany: State University of New York Press, 2007.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMullin, Richard P. The Soul of Classical American Philosophy: The Ethical and Spiritual Insights of William James, Josiah Royce, and Charles Sanders Peirce. State University of New York Press, 2007.
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