Murphy. Virtuous Necessity. University of Michigan Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMurphy. Virtuous Necessity. University of Michigan Press.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMurphy. Virtuous Necessity. University of Michigan Press.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.