Pancaldi, G. Darwin's intellectual development: (commentary) / Giuliano Pancaldi. 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)Pancaldi, Giuliano. "Darwin's Intellectual Development: (commentary) / Giuliano Pancaldi." 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)Pancaldi, Giuliano. "Darwin's Intellectual Development: (commentary) / Giuliano Pancaldi." The Darwinian Heritage : [incl. Proceed. of the Charles Darwin Centenary Conference, Florence Center for the History and Philosophy of Science, June 1982].(1985), .