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.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGeary, 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.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGeary, 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.
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