Williams, B. (1993). Same and necessity. University of California Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWilliams, Bernard. Same and Necessity. University of California Press, 1993.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWilliams, Bernard. Same and Necessity. University of California Press, 1993.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.