Geary, R. (2018). The true death of Billy the Kid: Being an authentic narrative of the final days in his brief and turbulent life. NBM Publishing.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Geary, Rick. The True Death of Billy the Kid: Being an Authentic Narrative of the Final Days in His Brief and Turbulent Life. New York: NBM Publishing, 2018.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Geary, Rick. The True Death of Billy the Kid: Being an Authentic Narrative of the Final Days in His Brief and Turbulent Life. NBM Publishing, 2018.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.