Porter, T. M. The Biometric Sense of Heredity: Statistics, Pangenesis and Postivism / Theodore M. Porter. Conference A Cultural History of Heredity III : 19th and early 20th centuries.(2005).
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Porter, Theodore M. "The Biometric Sense of Heredity: Statistics, Pangenesis and Postivism / Theodore M. Porter." Conference A Cultural History of Heredity III : 19th and Early 20th Centuries.(2005) .
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Porter, Theodore M. "The Biometric Sense of Heredity: Statistics, Pangenesis and Postivism / Theodore M. Porter." Conference A Cultural History of Heredity III : 19th and Early 20th Centuries.(2005), .
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