Goddard, H. H. (1912). The Kallikak family: A study in the heredity of feeblemindedness. The Macmillan Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGoddard, Henry Herbert. The Kallikak Family: A Study in the Heredity of Feeblemindedness. New York: The Macmillan Company, 1912.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGoddard, Henry Herbert. The Kallikak Family: A Study in the Heredity of Feeblemindedness. The Macmillan Company, 1912.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.