APA (7 वां संस्करण) प्रशस्ति पत्र
Wallace, A. R., & Costa, J. T. (2013). On the organic law of change: A facsimile edition and annotated transcription of Alfred Russel Wallace's Species notebook of 1855-1859. Harvard University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Wallace, Alfred Russel, और James T. Costa. On the Organic Law of Change: A Facsimile Edition and Annotated Transcription of Alfred Russel Wallace's Species Notebook of 1855-1859. Cambridge, Massachusetts: Harvard University Press, 2013.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Wallace, Alfred Russel, और James T. Costa. On the Organic Law of Change: A Facsimile Edition and Annotated Transcription of Alfred Russel Wallace's Species Notebook of 1855-1859. Harvard University Press, 2013.
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