Richards, R. J. Darwin on mind, morals and emotions: Robert J. Richards. The Cambridge Companion to Darwin.(2006).
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRichards, Robert J. "Darwin on Mind, Morals and Emotions: Robert J. Richards." The Cambridge Companion to Darwin.(2006) .
एमएलए (8वां संस्करण) प्रशस्ति पत्रRichards, Robert J. "Darwin on Mind, Morals and Emotions: Robert J. Richards." The Cambridge Companion to Darwin.(2006), .
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.