Darwin, C. (1962). The origin of species: By means of natural selection or the preservation of favored races in the struggle for life. The Nodern Library.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Darwin, Charles. The Origin of Species: By Means of Natural Selection or the Preservation of Favored Races in the Struggle for Life. New York: The Nodern Library, 1962.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Darwin, Charles. The Origin of Species: By Means of Natural Selection or the Preservation of Favored Races in the Struggle for Life. The Nodern Library, 1962.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.