Morris, R. T. (1910). Dawn of the fourth era in surgery: And other short articles previously published. W.B.Saunders company.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Morris, Robert T. Dawn of the Fourth Era in Surgery: And Other Short Articles Previously Published. Philadelphia and London: W.B.Saunders company, 1910.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Morris, Robert T. Dawn of the Fourth Era in Surgery: And Other Short Articles Previously Published. W.B.Saunders company, 1910.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.