Nicholson, H. A. The Ancient Life History of the Earth A Comprehensive Outline of the Principles and Leading Facts of Palæontological Science.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNicholson, Henry Alleyne. The Ancient Life History of the Earth A Comprehensive Outline of the Principles and Leading Facts of Palæontological Science.
एमएलए (9वां संस्करण) प्रशस्ति पत्रNicholson, Henry Alleyne. The Ancient Life History of the Earth A Comprehensive Outline of the Principles and Leading Facts of Palæontological Science.
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