Rauhut, N. C. (2007). Ultimate questions: Thinking about philosophy (2nd ed.). Pearson Longman.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRauhut, Nils Ch. Ultimate Questions: Thinking About Philosophy. 2nd ed. New York: Pearson Longman, 2007.
एमएलए (9वां संस्करण) प्रशस्ति पत्रRauhut, Nils Ch. Ultimate Questions: Thinking About Philosophy. 2nd ed. Pearson Longman, 2007.
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