Grier, W. P. (1865). Printed Special Orders No. 33, To: Medical Cadet Robert O'Reilly From: William P. Grier, Assistant Surgeon & Medical Director, February 18, 1865.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Grier, William P. Printed Special Orders No. 33, To: Medical Cadet Robert O'Reilly From: William P. Grier, Assistant Surgeon & Medical Director, February 18, 1865. 1865.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Grier, William P. Printed Special Orders No. 33, To: Medical Cadet Robert O'Reilly From: William P. Grier, Assistant Surgeon & Medical Director, February 18, 1865. 1865.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.