Darwin, C. (1859). On the origin of species by means of natural selection: Or, The preservation of favoured races in the struggle for life (First edition.). J. Murray.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Darwin, Charles. On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life. First edition. London: J. Murray, 1859.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Darwin, Charles. On the Origin of Species by Means of Natural Selection: Or, The Preservation of Favoured Races in the Struggle for Life. First edition. J. Murray, 1859.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.