1 2 Beck, B.J. Mansvelt (2008). "The fall of Han". ใน Twitchett, D.; Fairbank, J.K. (บ.ก.). The Cambridge History of China. Vol. Volume 1: The Ch'in and Han Empires, 221 B.C.–A.D. 220. Cambridge University Press. pp. 317–376. {{cite book}}: |volume= has extra text (help)