Charter, S. P. R. (1962). Man on earth: A preliminary evaluation of the ecology of man. Contact Editions.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCharter, S. P. R. Man on Earth: A Preliminary Evaluation of the Ecology of Man. California: Contact Editions, 1962.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCharter, S. P. R. Man on Earth: A Preliminary Evaluation of the Ecology of Man. Contact Editions, 1962.
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