Secord, J. A. Darwin and the breeders: A social history / James A. Secord. The Darwinian heritage : [incl. proceed. of the Charles Darwin Centenary Conference, Florence Center for the History and Philosophy of Science, June 1982].(1985).
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Secord, James A. "Darwin and the Breeders: A Social History / James A. Secord." The Darwinian Heritage : [incl. Proceed. of the Charles Darwin Centenary Conference, Florence Center for the History and Philosophy of Science, June 1982].(1985) .
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Secord, James A. "Darwin and the Breeders: A Social History / James A. Secord." The Darwinian Heritage : [incl. Proceed. of the Charles Darwin Centenary Conference, Florence Center for the History and Philosophy of Science, June 1982].(1985), .