Darwin, C., & Hutchins, R. M. The origin of species by means of natural selection: the descent of man and selection in relation to sex: Charles Darwin.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Darwin, Charles., و Robert Maynar Hutchins. The Origin of Species by Means of Natural Selection: The Descent of Man and Selection in Relation to Sex: Charles Darwin.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Darwin, Charles., و Robert Maynar Hutchins. The Origin of Species by Means of Natural Selection: The Descent of Man and Selection in Relation to Sex: Charles Darwin.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.