Hrdlicka, A. (1918). Recent discoveries attributed to early man in America. Govt. Print. Office.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHrdlicka, Ales. Recent Discoveries Attributed to Early Man in America. Washington: Govt. Print. Office, 1918.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHrdlicka, Ales. Recent Discoveries Attributed to Early Man in America. Govt. Print. Office, 1918.
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