Eichhoefer, G. W. (1995). Enduring issues in philosophy: Opposing viewpoints. Greenhaven Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEichhoefer, Gerald W. Enduring Issues in Philosophy: Opposing Viewpoints. San Diego, CA: Greenhaven Press, 1995.
एमएलए (8वां संस्करण) प्रशस्ति पत्रEichhoefer, Gerald W. Enduring Issues in Philosophy: Opposing Viewpoints. Greenhaven Press, 1995.
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