Jelaskan Kutipan dari Pertempuran Talas

Beckwith, Christopher I. (2009): Empires of the Silk Road: A History of Central Eurasia from the Bronze Age to the Present. Princeton: Princeton University Press. .

Xue, Zongzheng (1998). Anxi and Beiting Protectorates: A Research on Frontier Policy in Tang Dynasty's Western Boundary. Harbin: Heilongjiang Education Press. .