Darwin, C. (1872). On the origin of species: By means of natural selection (Sixth edition.). The Floating Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDarwin, Charles. On the Origin of Species: By Means of Natural Selection. Sixth edition. [Auckland, New Zealand]: The Floating Press, 1872.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDarwin, Charles. On the Origin of Species: By Means of Natural Selection. Sixth edition. The Floating Press, 1872.
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